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