Main.py

# coding: utf-8
# 2つのバイグラムの和集合、積集合、差集合

def bi_gram(s):
    result = []
    for i in range(0, len(s)-1):
        result.append(s[i:i+2])
    return result
    
s1 = 'paraparaparadise'
s2 = 'paragraph'

X = set(bi_gram(s1))
Y = set(bi_gram(s2))
print("X = ", X)
print("Y = ", Y)
print("union: ", X | Y) # union
print("intersection: ", X & Y) # intersection
print("difference: ", X - Y) # difference

if "se" in X:
    print("X contain 'se'.")
else:
    print("X doesn't contain 'se'.")
    
if "se" in Y:
    print("Y contain 'se'.")
else:
    print("Y doesn't contain 'se'.")