#include <bits/stdc++.h>
using namespace std;
int main() {
  int t, x1, y1, x2, y2;
  cin >> t;
  while (t--) {
    cin >> x1 >> y1 >> x2 >> y2;
    if (x1 == x2 || y1 == y2) {
      cout << abs(x1 - x2) + abs(y1 - y2) << endl;
    } else {
      cout << 2 + (abs(x1 - x2) + abs(y1 - y2)) << endl;
    }
  }
  return 0;
}
