def decode(g):
r = int(g[:2],16)
email = ''.join([chr(int(g[i:i+2], 16) ^ r) for i in range(2, len(g), 2)])
return email
print(decode('e9aaa9a1'))
#C@H
print("\u0417\u0430\u043c\u0448\u0435\u0432\u0456 \u043c\u044e\u043b\u0456")