#include <bits/stdc++.h>
#include <cmath>
using namespace std;

int main() {
    int t;
    cin >> t;
    while(t--) {
        int x1, y1, x2, y2;
        int m = 0;
        cin >> x1 >> y1 >> x2 >> y2;
        m += abs(x1-x2);
        m += abs(y1-y2);
        if(abs(x1-x2)*abs(y1-y2)) {
            m += 2;
        }
        cout << m << endl;
    }
    return 0;
}