func_code_string: #include <bits/stdc++.h>   using namespace std;   int g2[1002][1002];   int main() {     int n, m;     cin >> n >> m;     for (int i = n; i <= m; i++) {       int ind = 0;       string s = to_string(i);       string m = s;       sort(s.begin(), s.end());       for (int p = 1; p < s.size(); p++)         if (s[p] == s[p - 1]) {           ind = 1;           break;         }       if (ind == 1) continue;       cout << m;       return 0;     }     cout << -1;     return 0;   }   