#include <iostream>
using namespace std;
typedef long long ll;

int main(){
    int T;
    cin >> T;
    while(T--){
        ll A,B,C,D;
        cin >> A >> B >> C >> D;
        //C < D に統一する
        if (C > D){
            swap(A, B);
            swap(C, D);
        }
        ll ans = 0;
        if (A < B){
            if (A <= C && B <= D){
                ans = (C - A) + (D - B);
            }
            else if (A <= C && B > D){
                if (A == 1) ans = 3 + C + D;
                else ans = 2 + C + D;
            }
            else if (A > C && B <= D){
                ans = 1 + C + (D - B);
            }
            else{
                ans = 2 + C + D;
            }
        }
        else{
            if (B <= D){
                ans = 1 + (D - B) + C;
            }
            else{
                ans = 2 + C + D;
            }
        }
        cout << ans << endl;
    }
}