#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


struct FastIO{
  FastIO(){
    cin.tie(0);
    ios::sync_with_stdio(0);
  }
}fastio_beet;


template<typename T> void drop(const T &x){cout<<x<<endl;exit(0);}

//INSERT ABOVE HERE
signed main(){
  string s;
  cin>>s;

  string t;
  Int zs=0;
  for(char c:s){
    if(c=='0') zs++;
    else t+=c;
  }
  sort(t.rbegin(),t.rend());
  if(!prev_permutation(t.begin(),t.end())) drop(-1);

  cout<<t<<string(zs,'0')<<endl;
  return 0;
}