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