#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;
}
