func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string a, b;     cin >> a;     b = a;     long long int x = 0, y = 0, z = 0;     long long int i;     for (i = 0; i < a.size(); i++) {       if (a[i] ==  a ) {         x++;       }       if (a[i] ==  b ) {         y++;       }       if (a[i] ==  c ) {         z++;       }     }     sort(b.begin(), b.end());     if (b == a && (z == x || z == y) && x != 0 && y != 0 && z != 0) {       cout <<  YES  << endl;     } else {       cout <<  NO  << endl;     }     return 0;   }   