dictionaryMatch.js

const dictionaryMatch = (stringA, stringB) => {
  
  // create an empty dictionary to store your string
  const dictionary = {};
  
  // split stringA by character and iterate over it
  // create a new key value pair in the dictionary
  // for each unique character within the array
  stringA.split('').forEach(character => {
   dictionary[character] = character;
  });
  
  // perform a lookup in the dictionary: 
  // iterate over stringB, and check to see if the key
  // exists in the dictionary we just created
  const bLength = stringB.length;
  for (let i = 0; i < bLength; i++) {
    if (dictionary[stringB[i]] === stringB[i]) {
      return true;
    } 
  };
     
  // if the key does not exist then return false
  return false;
};


const HELLO = "Hello";
const GOODBYE = "Goodbye";

dictionaryMatch(HELLO, GOODBYE);