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