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