#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>

using namespace std;

int main() {
	string str;
	cin >> str;
	int n = str.size();
	string ans = str;

	for (int i = 0; i < n; i++) {
		for (int j = i + 1; j < n; j++) {
			swap(str[i], str[j]);
			ans = max(str, ans);
			swap(str[i], str[j]);
		}
	}

	cout << ans << endl;
	return 0;
}