# t1 = ("a", "b", "c")
# s1 = "abc"
# l1 = ["a", "b", "c"]
# d1 = {"a": 1, "b": 2, "c": 3}
# n1 = 123456
#
# print(",".join(t1), type(",".join(t1)))
# print(",".join(s1), type(",".join(s1)))
# print(",".join(l1), type(",".join(l1)))
# print(",".join(d1), type(",".join(d1)))
# print(",".join(n1), type(",".join(n1)))

#
# if 1 and 2 and 3 in [1, 2, 3, 4]:
#     print(456)

# d = {
#     1: "a",
#     2: "b",
#     3: "c"
# }
#
# for i in d:
#     print(d[i])


# a = [1]
# if a:
#     print(a)


a = "hello world"
print(a.split('').reverse().join(''))