#every lowercase letter [a..z] is replaced with the corresponding one in [z..a]
#every other character (including uppercase letters and punctuation) is left untouched.
# That is, ‘a’ becomes ‘z’, ‘b’ becomes ‘y’, ‘c’ becomes ‘x’, etc. For instance, the word “vmxibkgrlm”, when decoded, would become “encryption”.
#Write a function called answer(s) which takes in a string and returns the deciphered string
from string import ascii_lowercase as alphabet
def answer1(s):
	newlist = ''
	for element in s:
		if element in alphabet:
			position = alphabet.index(element)
			letter = alphabet[25 - position]
			newlist += letter
		else:
			newlist += element
	return ''.join(newlist)


#test
s = answer1("a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p")
print(s)