def outer(fun):
    def wrapper(s):
        # 获取字符串的前三个字符
        first_three = s[1:4]
        #倒序前三个字符
        reversed_three = first_three[::-1]
        # 返回拼接后的字符串
        return first_three + reversed_three
    return wrapper
@outer
def fun(s):
    return s


str = input()
print(fun(str))


# def process_list(li):
#     li[:] = li[:6]
#     li.sort(reverse=True)
#     l1 = li[1::2]
#     l2 = li[0::2]
#     l2.reverse()
#     li[:]= l2 + l1
#     return li

# # str="[2,1,6,4,5,3,7,8]"
# str=input()
# str=str[1:-1]

# after5 = str.split(',')
# res = process_list(after5)
# res2 = [int(i) for i in res]
# print(res2)