#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(a) (a).begin(),(a).end()
using namespace std;
typedef long long ll;

string f(string s) {
	string ret = "";
	for (auto c: s) {
		ret += ('9' - c) + '0';
	}
	return ret;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	string S;
	cin >> S;
	
	sort(S.rbegin(), S.rend());

	string T = f(S);
	next_permutation(all(T));
	T = f(T);

	if (T[0] == '0' || T == S) {
		cout << -1 << endl;
	}
	else {
		cout << T << endl;
	}
	return 0;
}