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'''
fileName : VigenereDecrypto.py
'''
def VigenereDecrypto (output , key) :
ptLen = len (output)
keyLen = len (key)
quotien = ptLen // keyLen
remainder = ptLen % keyLen
inp = ""
for i in range (0 , quotient) :
for j in range (0 , keyLen) :
c = int((ord(output[i*keyLen+j]) - ord('a') + 26 - (ord(key[j]) - ord('a')) % 26 + ord('a')))
inp += chr (c)
for i in range (0 , remainder) :
c = int((ord(output[quotient*keyLen + i]) - ord('a') + 26 - (ord(key[i]) - ord('a')) % 26 + ord('a')))
inp += chr (c)
return inp
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