#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <sstream>
#include <cstdio>
#include <cstdlib>
#include <cmath>


using namespace std;

int main(){
    int N;
    string S;
    cin >> S;

    vector<char> v;
    for(int i = 0; i< S.size(); i++)
        v.push_back(S[i]);

    int count = 0;
    vector<char>::iterator it = v.begin();
    while(count < 2 and it != v.end()){
        auto m = max_element(it, v.end());
        if(it != m){
            swap(*it, *m);
            count ++;
        }
        it++;
    }

    for(int i=0 ;i < v.size(); i++)
        cout << v[i];

    cout << endl;
    
    return 0;
}