encryption_key = (('a','m'),('b','h'),('c','t'),('d','f'),('e','g'),
                  ('f','k'),('g','b'),('h','p'),('i','j'),('j','w'),
                  ('k','e'),('l','r'),('m','q'),('n','s'),('o','l'),
                  ('p','n'),('q','i'),('r','u'),('s','o'),('t','x'),
                  ('u','z'),('v','y'),('w','v'),('x','d'),('y','c'),('z','a'),
                  ('0','7'),('1','3'),('2','8'),('3','9'),('4','5'),
                  ('5','6'),('6','0'),('7','1'),('8','4'),('9','2'))