/* -*- coding: utf-8 -*-
 *
 * 39.cc: No.39 桁の数字を入れ替え - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 9;

/* typedef */

typedef pair<int,int> pii;

/* global variables */

int ds[MAX_N];
pii pdis[MAX_N];

/* subroutines */

/* main */

int main() {
  string s;
  cin >> s;
  int n = s.size();

  for (int i = 0; i < n; i++) {
    ds[i] = s[i] - '0';
    pdis[i] = pii(ds[i], i);
  }
  sort(pdis, pdis + n, greater<pii>());

  for (int i = 0; i < n; i++)
    if (ds[i] != pdis[i].first) {
      swap(ds[i], ds[pdis[i].second]);
      break;
    }
  
  for (int i = 0; i < n; i++) printf("%d", ds[i]);
  putchar('\n');

  return 0;
}