/* -*- 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 */

/* global variables */

int ds[MAX_N], maxds[MAX_N + 1], maxis[MAX_N + 1];

/* subroutines */

/* main */

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

  for (int i = 0; i < n; i++) ds[i] = s[i] - '0';

  maxds[n] = maxis[n] = -1;
  for (int i = n - 1; i >= 0; i--) {
    maxds[i] = maxds[i + 1];
    maxis[i] = maxis[i + 1];
    if (maxds[i] < ds[i]) maxds[i] = ds[i], maxis[i] = i;
  }
  //for (int i = 0; i < n; i++) printf("(%d,%d)", maxds[i], maxis[i]);
  //putchar('\n');
  
  for (int i = 0; i < n; i++)
    if (ds[i] != maxds[i]) {
      swap(ds[i], ds[maxis[i]]);
      break;
    }
  
  for (int i = 0; i < n; i++) printf("%d", ds[i]);
  putchar('\n');

  return 0;
}