# Enter your code here. Read input from STDIN. Print output to STDOUT key = raw_input() chipher = raw_input() chipher = chipher.decode('hex') def enc1(string, key): xored = '' for i in range (0, len(string)): xor = ord(string[i]) for j in range (0, len(key)): xor ^= ord(key[j]) xored += chr(xor) return xored.encode('hex') def enc2(string, key): xored = '' for i in range (0, len(string)): xor = ord(string[i]) ^ ord(key[i%len(key)]) xored += chr(xor) return xored xored = enc2(chipher, key) print xored