func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int mas[15] = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47};     int m, n;     bool ans = false;     cin >> n >> m;     for (int i = 0; i < 15; i++) {       if (mas[i] == n) {         if (mas[i + 1] == m) {           ans = true;           break;         }       }     }     if (ans)       cout <<  YES  << endl;     else       cout <<  NO  << endl;     return 0;   }   