func_code_string: #include <bits/stdc++.h>   int sw, sw1, sw2;   int main() {     char a[1000];     scanf( %s , a);     int n;     scanf( %d , &n);     for (int i = 0; i < n; i++) {       char b[10];       scanf( %s , b);       if (b[0] == a[0] && b[1] == a[1]) sw = 1;       if (b[1] == a[0]) sw1 = 1;       if (b[0] == a[1]) sw2 = 1;     }     if (sw == 1 || sw1 == 1 && sw2 == 1)       printf( YES );     else       printf( NO );   }   