import sys
import string
alpha = string.uppercase[:26] #[A..Z]
perm = (sys.argv[1]).upper() #first command line arg
plaintext = (sys.argv[2]).upper() #second command line arg
ciphertext = []
for c in plaintext:
	x = alpha.index(c) #index of c in alphabet (ex: 'c' is 2)
	x = perm[x] #index of c in permutated alphabet
	ciphertext.append(x)

print("".join(ciphertext))