num = input()
for x in num[::-1]:
    print(x, end="")

b7729a823afa99d28a5e44230fb01ffd84497083
<mask token>

<mask token>
for x in num[::-1]:
    print(x, end='')

num = input()
for x in num[::-1]:
    print(x, end='')

num = input()
for x in num[::-1]:
    print(x, end="")
