func_code_string: #include <bits/stdc++.h>   char ans[4][128];   int main() {     int i, j, n;     while (scanf( %d , &n) != EOF) {       memset(ans, 0, sizeof(ans));       if (n % 2 == 1) {         j = 0;         ans[0][0] =  a  + j;         ans[1][0] =  a  + j;         j = (j + 1) % 26;         for (i = 0; i < n; i += 2) {           ans[0][i + 1] = ans[0][i + 2] =  a  + j;           j = (j + 1) % 26;           ans[1][i + 1] = ans[1][i + 2] =  a  + j;           j = (j + 1) % 26;           ans[2][i + 1] = ans[2][i] =  a  + j;           j = (j + 1) % 26;           ans[3][i + 1] = ans[3][i] =  a  + j;           j = (j + 1) % 26;         }         ans[2][n - 1] =  a  + j;         ans[3][n - 1] =  a  + j;         ans[0][n] = ans[1][n] = ans[2][n] = ans[3][n] =   0 ;       } else {         j = 0;         ans[1][0] =  a  + j;         ans[2][0] =  a  + j;         j = (j + 1) % 26;         for (i = 0; i < n; i += 2) {           ans[1][i + 1] = ans[1][i + 2] =  a  + j;           j = (j + 1) % 26;           ans[2][i + 1] = ans[2][i + 2] =  a  + j;           j = (j + 1) % 26;           ans[0][i + 1] = ans[0][i] =  a  + j;           j = (j + 1) % 26;           ans[3][i + 1] = ans[3][i] =  a  + j;           j = (j + 1) % 26;         }         ans[1][n - 1] =  a  + j;         ans[2][n - 1] =  a  + j;         ans[0][n] = ans[1][n] = ans[2][n] = ans[3][n] =   0 ;       }       puts(ans[0]);       puts(ans[1]);       puts(ans[2]);       puts(ans[3]);     }     return 0;   }   