#pragma GCC optimize("O3")
#pragma GCC target("avx")
#include <bits/stdc++.h>
#define rep(i ,n) for(int i=0;i<(int)(n);++i)
#define repr(i ,n) for(int i=n;i>(int)(n);--i)
#define rep1(i ,n) for(int i=1;i<=(int)(n);++i)
#define ALL(a) a.begin(), a.end()
#define SORT(a) sort(ALL(a))
#define RSORT(a) sort(ALL(a),greater<>())
#define bit_check(bit, i) ((bit>>(i)) & 1)
#define PRINT(x) printf("%d\n",(x));
using namespace std;
typedef long long int i64;
typedef unsigned long long u64;
template<class T> using V = vector<T>;
using I = int;
using VI = V<I>;
const int INF = 2e9;
const i64 MOD = 1e9 + 7;

template <class T> inline bool chmin(T& a, T b){if(a>b){a=b; return true;} return false;}
template <class T> inline bool chmax(T& a, T b){if(a<b){a=b; return true;} return false;}

string conv(string s){
    string ret;
    char c;
    for(int i=0; i<s.size() ; ++i ){
        c='9'-s[i]+'0';
        ret += c;
    }
    return ret;
}

int main(){
    string s; cin >> s;
    RSORT(s);
    string ss = conv(s);
    next_permutation(ALL(ss));
    ss = conv(ss);
    if( ss[0] == '0' || s == ss){
        PRINT(-1);
    } else {
        cout << ss << endl;
    }
}