146 - ID Codes

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
#define sz(x) int(x.size())
#define all(x) x.begin(), x.end()

int main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    string s;
    while (cin >> s, s != "#") {
        if (is_sorted(all(s), [](char a, char b) {
                return a > b;
            })) {
            cout << "No Successor\n";
        }
        else {
            next_permutation(all(s));
            cout << s << endl;
        }
    }
}