c5b = open('2013/5b.ciphertext').read()
c6a = open('2013/6a.ciphertext').read()
c6b = open('2013/6b.ciphertext').read()
-c7a = open('2013/6a.ciphertext').read()
-c7b = open('2013/6b.ciphertext').read()
+c7a = open('2013/7a.ciphertext').read()
+c7b = open('2013/7b.ciphertext').read()
p1a = caesar_decipher(c1a, 8)
p1b = caesar_decipher(c1b, 14)