#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main(){
	string n; cin >> n;
	string ret = n;
	for (int i = 0; i < n.size(); i++){
		for (int j = 1; j < n.size(); j++){
			swap(n[i], n[j]);
			ret = max(ret, n);
			swap(n[i], n[j]);
		}
	}
	cout << ret << endl;
	return 0;
}