#include<cstdio>
#include<algorithm>
using namespace std;

int main(){
    int total_testcases;
    scanf("%d", &total_testcases);
    for (int testcase_i = 1; testcase_i <= total_testcases; ++testcase_i){
        int A, B, C, D;
        scanf("%d %d %d %d", &A, &B, &C, &D);
        auto solve = [&](){
            if(C < A && D < B) return C + D + 2;
            if(D < B) tie(A, B, C, D) = make_tuple(B, A, D, C);
            if(C < A) return D < C ? C + D + 2 + int(B == 1) : C + 1 + D - B;
            if((A < B) ^ (D < C)) return C - A + D - B;
            if(B < A) tie(A, B, C, D) = make_tuple(B, A, D, C);
            return C - A + D + 1;
        };
        printf("%d\n", solve());
    }
    return 0;
}