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