func_code_string: #include <bits/stdc++.h>   const long long int m = 1000000007;   using namespace std;   int main() {     int tc;     cin >> tc;     while (tc--) {       int x1, y1, x2, y2;       cin >> x1 >> y1 >> x2 >> y2;       if (x1 == x2 || y1 == y2)         cout << abs(x1 - x2) + abs(y2 - y1) <<   n ;       else         cout << abs(x2 - x1) + abs(y2 - y1) + 2 <<   n ;     }     return 0;   }   