func_code_string: #include <bits/stdc++.h>   using namespace std;   int aa(int n) {     int a = 0;     for (int i = 2; i <= n - 1; i++)       if (n % i == 0) {         a = 1;         break;       } else         a = 0;     return a;   }   int main() {     int n;     cin >> n;     for (int i = 1; i <= n; i++) {       if (aa(i) == 1 && aa(n - i) == 1) {         cout << i <<     << n - i << endl;         break;       }     }   }   