#include <bits/stdc++.h> using namespace std; int main() { int n; cin >> n; int a = n / 10000; int b = n / 1000 % 10; int c = n / 100 % 10 ; int d = n % 10000 % 1000 % 100 / 10; int i = n % 10000 % 1000 % 100 % 10; cout << i << d << c << b << a; return 0; }