#include<bits/stdc++.h>
using namespace std;
#define int long long
int T, a, b, c, d;
signed main() {
	cin >> T;
	while(T --) {
		cin >> a >> b >> c >> d;
		int x = abs(c - a), y = (d - b);
		int ans = max(x, y) * 2;
		if(y % 2 != x % 2) ans -= 1;
		cout << ans << endl;
	}
}