func_code_string: #include <bits/stdc++.h>   using namespace std;   using INT = long long;   string a[111];   int main() {     int n;     string s;     cin >> s;     cin >> n;     int flag = 0;     for (int i = 1; i <= n; i++) {       cin >> a[i];       if (a[i] == s) flag |= 3;       if (a[i][1] == s[0]) flag |= 1;       if (a[i][0] == s[1]) flag |= 2;     }     if (flag == 3) return puts( YES ), 0;     return puts( NO ), 0;   }   