usr_inp = input()

if usr_inp.isalpha():
    print(usr_inp[::-1])

else:
    usr_inp = float(usr_inp)
    usr_inp += 1
    digit_after_decimal = (usr_inp * 10) % 10

    if digit_after_decimal == 0:
        print(f"{usr_inp:.0f}")
    else:
        print(usr_inp)