#include <bits/stdc++.h>

using namespace std;

void fast_io() {
	ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
}

int main() {
	fast_io();
	string s;
	cin >> s;
	int r = 0;
	while (s[r] >= 'a' && s[r] <= 'z') r++;
	reverse(s.begin(), s.begin() + r);
	cout << s << endl;
}