func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int k = 0;     int a, b, c;     string s1, s2, s3;     cin >> s1 >> s2 >> s3;     a = s1.size();     b = s2.size();     c = s3.size();     if ((a + b) != c) {       cout <<  NO ;       return 0;     }     s1 = s1 + s2;     for (int i = 0; i < c; i++) {       for (int j = 0; j < c; j++) {         if (s1[i] == s3[j]) {           k++;           s3[j] =  0 ;           break;         }       }     }     if (k == c)       cout <<  YES ;     else       cout <<  NO ;     return 0;   }   