func_code_string: #include <bits/stdc++.h>   using namespace std;   char a[105][105];   int main() {     int n, m;     cin >> n >> m;     for (int i = 1; i <= m; i++) {       for (int j = 1; j <= n; j++) {         cin >> a[i][j];       }     }     for (int i = 1; i <= n; i++) {       for (int k = 1; k <= 2; k++) {         for (int j = 1; j <= m; j++) {           cout << a[j][i] << a[j][i];         }         cout << endl;       }     }     return 0;   }   