#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    string s; cin >> s;
    int n = s.size();
    string answer = s;
    for(int i=0; i<n; i++) for(int k=i+1; k<n; k++){
        string t = s;
        swap(t.at(i),t.at(k));
        answer = max(answer,t);
    }
    cout << answer << endl;
}