func_code_string: #include <bits/stdc++.h>   using namespace std;   int t, n, m;   int a[10][10];   int main() {     cin >> t;     while (t--) {       cin >> n >> m;       int ok = 0;       for (int i = 1; i <= n; i++) {         cin >> a[1][1] >> a[1][2] >> a[2][1] >> a[2][2];         if (a[1][2] == a[2][1]) {           ok = 1;         }       }       if (m % 2) ok = 0;       if (ok)         cout <<  YES  << endl;       else         cout <<  NO  << endl;     }     return 0;   }   