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