#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <string>
#include <queue>
#include <stack>
#include <math.h>
#include <set>
#define ALL(obj) (obj).begin(),(obj).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define P pair<int, int>

#define MOD 1000000007
#define INF 1012345678
#define NINF (-2147483647-1)
#define LLINF 9223372036854775807
using ll = long long;
using namespace std;

int main() {
    string S,T,U;
    cin >> S;
    T = U = S;
    for (int i = 0; i < S.length() - 1; i++)
    {
        for (int j = i + 1; j < S.length(); j++)
        {
            T = S;
            swap(T[i], T[j]);
            if (U.compare(T) < 0) {
                U = T;
            }
        }
    }
    cout << U << endl;
    getchar(); getchar();
    return 0;
}