def swap_first_last_digit(number):
    s=str(number)
    if len(s)<=1:
        return number
    return int(s[-1]+s[1:-1]+s[0])
try:
    user_input=input()
    number=int(user_input)
    swapped_number=swap_first_last_digit(number)
    print(swapped_number)
except ValueError:
    print("Invalid Input")