#include <bits/stdc++.h>
using namespace std;
void solve() {
  int x1, x2, y1, y2;
  cin >> x1 >> y1 >> x2 >> y2;
  if ((x1 == x2) && (y1 == y2)) {
    cout << 0 << '\n';
  } else if (x1 == x2) {
    cout << abs(y2 - y1) << '\n';
  } else if (y1 == y2) {
    cout << abs(x2 - x1) << '\n';
  } else {
    int res = (abs(x2 - x1) + abs(y2 - y1)) + 2;
    cout << res << '\n';
  }
}
int main() {
  ios::sync_with_stdio(0), cin.tie(0);
  int t = 0;
  cin >> t;
  for (int i = 0; i < t; i++) {
    solve();
  }
  return 0;
}
