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pradipchitrakar/BsToAdConverter.ts

Created July 9, 2020 20:48
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Converts date in Bikram Sambat to A.D. and vice versa in typescript/javascript.
Raw
BsToAdConverter.ts
export class NepaliDateConverterService {
nums = {
0: '०',
1: '१',
2: '२',
3: '३',
4: '४',
5: '५',
6: '६',
7: '७',
8: '८',
9: '९'
};
defaults = {
lang: 'ne', // possible values: ne for nepali text, en for english text
// dateFormat: 'yyyy/mm/dd', // not implemented yet
monthFormat: 'full', // possible values: full for full name, short for short name
daysFormat: 'min', // possible values: full for full name, short for short name and min for minified name
};
ne = {
monthsName: ['बैशाख', 'जेष्ठ', 'आषाढ', 'श्रावण', 'भाद्र', 'आश्विन', 'कार्तिक', 'मंसिर', 'पौष', 'माघ', 'फाल्गुन', 'चैत्र'],
monthsShortName: ['बै', 'जे', 'आषा', 'श्रा', 'भा', 'आश', 'का', 'मं', 'पौ', 'मा', 'फा', 'चै'],
};
en = {
monthsName: ['Baisakh', 'Jestha', 'Ashadh', 'Shrawan', 'Bhadra', 'Ashwin', 'Kartik', 'Mangsir', 'Paush', 'Mangh', 'Falgun', 'Chaitra'],
monthsShortName: ['Bai', 'Je', 'As', 'Shra', 'Bha', 'Ash', 'Kar', 'Mang', 'Pau', 'Ma', 'Fal', 'Chai'],
};
engDaysName = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
engDaysShortName = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
engMonthsName = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
engMonthsShortName = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
daysInYear = 365;
minMonth = 1;
minDays = 1;
maxMonth = 12;
maxDays = 32;
// tslint:disable-next-line:variable-name
base_ad = {year: 2017, month: 2, day: 11, dayOfWeek: 6}; // dayOfWeek: 0 for sunday, 1 for monday and so on
// tslint:disable-next-line:variable-name
base_bs = {year: 2073, month: 10, day: 29, dayOfWeek: 6};
// tslint:disable-next-line:variable-name
calendar_data = {
'1978': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1979': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'1980': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'1981': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'1982': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1983': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'1984': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'1985': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'1986': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1987': [ 31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'1988': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'1989': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1990': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1991': [ 31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'1992': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'1993': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1994': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1995': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'1996': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'1997': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1998': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'1999': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2000': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 365 ],
'2001': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2002': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2003': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2004': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 365 ],
'2005': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2006': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2007': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2008': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31, 365 ],
'2009': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2010': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2011': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2012': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'2013': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2014': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2015': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2016': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'2017': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2018': [ 31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2019': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'2020': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2021': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2022': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'2023': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'2024': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2025': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2026': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2027': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 365 ],
'2028': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2029': [ 31, 31, 32, 31, 32, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2030': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2031': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 365 ],
'2032': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2033': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2034': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2035': [ 30, 32, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31, 365 ],
'2036': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2037': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2038': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2039': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'2040': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2041': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2042': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2043': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'2044': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2045': [ 31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2046': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2047': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2048': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2049': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'2050': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'2051': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2052': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2053': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'2054': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'2055': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2056': [ 31, 31, 32, 31, 32, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2057': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2058': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 365 ],
'2059': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2060': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2061': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2062': [ 30, 32, 31, 32, 31, 31, 29, 30, 29, 30, 29, 31, 365 ],
'2063': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2064': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2065': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2066': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 29, 31, 365 ],
'2067': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2068': [ 31, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2069': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2070': [ 31, 31, 31, 32, 31, 31, 29, 30, 30, 29, 30, 30, 365 ],
'2071': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2072': [ 31, 32, 31, 32, 31, 30, 30, 29, 30, 29, 30, 30, 365 ],
'2073': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 31, 366 ],
'2074': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2075': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2076': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'2077': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 29, 31, 366 ],
'2078': [ 31, 31, 31, 32, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2079': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 29, 30, 30, 365 ],
'2080': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 29, 30, 30, 365 ],
'2081': [ 31, 31, 32, 32, 31, 30, 30, 30, 29, 30, 30, 30, 366 ],
'2082': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2083': [ 31, 31, 32, 31, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2084': [ 31, 31, 32, 31, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2085': [ 31, 32, 31, 32, 30, 31, 30, 30, 29, 30, 30, 30, 366 ],
'2086': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2087': [ 31, 31, 32, 31, 31, 31, 30, 30, 29, 30, 30, 30, 366 ],
'2088': [ 30, 31, 32, 32, 30, 31, 30, 30, 29, 30, 30, 30, 365 ],
'2089': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2090': [ 30, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2091': [ 31, 31, 32, 31, 31, 31, 30, 30, 29, 30, 30, 30, 366 ],
'2092': [ 31, 31, 32, 32, 31, 30, 30, 30, 29, 30, 30, 30, 366 ]
};
/*
* gathered data below; if anybody can validate below, thanks!
* A hacky way is to iterate for the unknown dates is to use daysPerYear and loop through
*
'2093': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 366 ],
'2094': [ 31, 31, 32, 31, 31, 30, 30, 30, 29, 30, 30, 30, 365 ],
'2095': [ 31, 31, 32, 31, 31, 31, 30, 29, 30, 30, 30, 30, 366 ],
'2096': [ 30, 31, 32, 32, 31, 30, 30, 29, 30, 29, 30, 30, 364 ],
'2097': [ 31, 32, 31, 32, 31, 30, 30, 30, 29, 30, 30, 30, 366 ],
'2098': [ 31, 31, 32, 31, 31, 31, 29, 30, 29, 30, 30, 31, 366 ],
'2099': [ 31, 31, 32, 31, 31, 31, 30, 29, 29, 30, 30, 30, 365 ],
'2100': [ 31, 32, 31, 32, 30, 31, 30, 29, 30, 29, 30, 30, 365 ]
*/
getNepaliNumber(strNum) {
const arrNumNe = strNum.toString().split('').map( (ch) => {
if (ch === '.' || ch === ',') {
return ch;
}
return this.nums[Number(ch)];
});
return arrNumNe.join('');
}
getNepDayOfWeek(inp, opts?) {
if (Object.prototype.toString.call(inp) === '[object Object]') {
opts = inp;
inp = undefined;
}
if (inp !== undefined && Object.prototype.toString.call(inp) !== '[object Date]' && typeof inp !== 'number') {
return new TypeError('Expected a date object or a number');
}
if (typeof inp === 'number' && (inp < 0 || inp > 6)) {
return new RangeError('Expected the value of inp between 0-6');
}
opts = opts || {};
const data: any = {};
data.ne = {
full: ['आइतबार', 'सोमबार', 'मंगलबार', 'बुधबार', 'बिहिबार', 'शुक्रबार', 'शनिबार'],
short: ['आइत', 'सोम', 'मंगल', 'बुध', 'बिहि', 'शुक्र', 'शनि'],
min: ['आ', 'सो', 'मं', 'बु', 'बि', 'शु', 'श']
};
data.en = {
full: ['Aaitabaar', 'Sombaar', 'Mangalbaar', 'Budhabaar', 'Bihibaar', 'Shukrabaar', 'Shanibaar'],
short: ['Aaita', 'Som', 'Mangal', 'Budha', 'Bihi', 'Shukra', 'Shani'],
min: ['Aai', 'So', 'Man', 'Bu', 'Bi', 'Shu', 'Sha']
};
let lang = 'ne';
if (opts.lang === 'en') {
lang = 'en';
}
if (inp === undefined) {
inp = new Date().getDay();
}
if (Object.prototype.toString.call(inp) === '[object Date]') {
inp = inp.getDay();
}
if (!opts.type) {
const nepday = {
full: data[lang].full[inp],
short: data[lang].short[inp],
min: data[lang].min[inp]
};
return nepday;
}
switch (opts.type) {
case 'short':
return data[lang].short[inp];
case 'min':
return data[lang].min[inp];
default:
return data[lang].full[inp];
}
}
constructor() {
}
countDaysInYear(year) {
if (typeof this.calendar_data[year] === 'undefined') {
return this.daysInYear;
}
return this.calendar_data[year][12];
}
isLeapYear(year) {
return (this.daysInYear !== this.countDaysInYear(year));
}
countBSDays(date) {
let dayCount = 0;
const dateArr = date.split('/').map((str) => {
return Number(str);
});
const dateObj = {year: dateArr[0], month: dateArr[1], day: dateArr[2]};
let inc = false;
if (dateArr[0] > this.base_bs.year) {
inc = true;
} else if (dateArr[0] === this.base_bs.year && dateArr[1] > this.base_bs.month) {
inc = true;
} else if (dateArr[0] === this.base_bs.year && dateArr[1] === this.base_bs.month && dateArr[2] > this.base_bs.day) {
inc = true;
}
let start: any = {};
let end: any = {};
let factor = 1;
if (inc === true) {
start = this.base_bs;
end = dateObj;
} else {
start = dateObj;
end = this.base_bs;
factor = -1;
}
for (let i = start.year; i <= end.year; i++) {
dayCount += this.calendar_data[i][12];
}
for (let i = 0; i < start.month - 1; i++) {
dayCount -= this.calendar_data[start.year][i];
}
// dayCount += calendar_data[start.year][12 - 1];
for (let i = end.month - 1; i < 12; i++) {
dayCount -= this.calendar_data[end.year][i];
}
dayCount -= start.day;
dayCount += end.day;
return (dayCount * factor);
}
countADDays(date) {
const dayCount = 0, i = 0;
const dateArr = date.split('/').map((str) => {
return Number(str);
});
const dateObj = {year: dateArr[0], month: dateArr[1] - 1, day: dateArr[2]};
const date1 = new Date(this.base_ad.year, this.base_ad.month - 1, this.base_ad.day);
const date2 = new Date(dateObj.year, dateObj.month, dateObj.day);
const timeDiff = date2.getTime() - date1.getTime();
const diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
return {diffDays, dateInAd: date2};
}
offsetBSDays(dayData) {
let dayCount = dayData.diffDays;
const dateInAd = dayData.dateInAd;
const bs_date = JSON.parse(JSON.stringify(this.base_bs));
if (dayCount >= 0) {
bs_date.day += dayCount;
while (bs_date.day > this.calendar_data[bs_date.year][bs_date.month - 1]) {
bs_date.day -= this.calendar_data[bs_date.year][bs_date.month - 1];
bs_date.month++;
if (bs_date.month > 12) {
bs_date.year++;
bs_date.month = 1;
}
}
} else {
dayCount = Math.abs(dayCount);
while (dayCount >= 0) {
if (dayCount < this.calendar_data[bs_date.year][bs_date.month - 1]) {
dayCount = this.calendar_data[bs_date.year][bs_date.month - 1] - dayCount;
break;
}
dayCount -= this.calendar_data[bs_date.year][bs_date.month - 1];
bs_date.month--;
if (bs_date.month === 0) {
bs_date.year--;
bs_date.month = 12;
}
}
bs_date.day = dayCount;
}
const month = dateInAd.getMonth(),
dayOfWeek = dateInAd.getDay();
const npDayOfWeek = this.getNepDayOfWeek(dayOfWeek),
enDayOfWeek = this.getNepDayOfWeek(dayOfWeek, {lang: 'en'});
const totalDays = this.calendar_data[bs_date.year][bs_date.month - 1]
const dateObj = {
ne: {
year: this.getNepaliNumber(bs_date.year),
month: this.getNepaliNumber(bs_date.month),
day: this.getNepaliNumber(bs_date.day),
strMonth: this.ne.monthsName[bs_date.month - 1],
strShortMonth: this.ne.monthsShortName[bs_date.month - 1],
dayOfWeek: this.getNepaliNumber(dayOfWeek),
strDayOfWeek: npDayOfWeek['full'],
strShortDayOfWeek: npDayOfWeek['short'],
strMinDayOfWeek: npDayOfWeek['min'],
totalDaysInMonth: this.getNepaliNumber(totalDays)
},
en: {
year: bs_date.year,
month: bs_date.month,
day: bs_date.day,
strMonth: this.en.monthsName[bs_date.month - 1],
strShortMonth: this.en.monthsShortName[bs_date.month - 1],
dayOfWeek,
strDayOfWeek: enDayOfWeek['full'],
strShortDayOfWeek: enDayOfWeek['short'],
strMinDayOfWeek: enDayOfWeek['min'],
totalDaysInMonth: totalDays
}
}
return dateObj;
}
offsetADDays(dayCount) {
const date = new Date(this.base_ad.year, this.base_ad.month - 1, this.base_ad.day);
date.setDate(date.getDate() + dayCount);
const month = date.getMonth(),
dayOfWeek = date.getDay();
const dateObj = {
year: date.getFullYear(),
month: month + 1,
strMonth: this.engMonthsName[month],
strShortMonth: this.engMonthsShortName[month],
day: date.getDate(),
dayOfWeek,
strDayOfWeek: this.engDaysName[dayOfWeek],
strShortDayOfWeek: this.engDaysShortName[dayOfWeek]
}
return dateObj;
}
bs2ad(date) {
return this.offsetADDays(this.countBSDays(date));
}
ad2bs(date) {
return this.offsetBSDays(this.countADDays(date));
}
}
// Example
// const date = new NepaliDateConverterService();
// console.log(date.ad2bs('2020/7/9'));
// console.log(date.bs2ad('2077/3/20'));
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