#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a; i < n; i++)
#define per(i,n,a) for (int i = n - 1; i >= a; i--)
using namespace std;

int main() {
    string s;
    int a;
    cin >> s;
    rep(i, 0, s.size()) {
        if (s[i] < s[i + 1]) {
            a = s[i + 1];
        }
    }
    per(i, s.size(), 0) {
        if (s[i] == a) {
            swap(s[0], s[i]);
        }
    }
    cout << s << endl;
}