#include <stdio.h>

long long solve(long long A, long long B, long long C, long long D)
{
	if (A <= C && B <= D) {
		if ((A - B) * (C - D) > 0) return C - A + D - B;
		else if (A != 0 && B != 0) {
			if (C < D) return solve(0, B, C, D) + 1;
			else return solve(A, 0, C, D) + 1;
		} else if (A == 0) {
			if (B == 1) return solve(A, B + 1, C, D) + 1;
			else return solve(A + 1, B, C, D) + 1;
		} else {
			if (A == 1) return solve(A + 1, B, C, D) + 1;
			else return solve(A, B + 1, C, D) + 1;
		}
	} else if (A <= C) {
		if (A != 0) return solve(A, 0, C, D) + 1;
		else return solve(A + 1, B, C, D) + 1;
	} else if (B <= D) {
		if (B != 0) return solve(0, B, C, D) + 1;
		else return solve(A, B + 1, C, D) + 1;
	} else {
		if (C < D) return solve(A, 0, C, D) + 1;
		else return solve(0, B, C, D) + 1;
	}
}

int main()
{
	int T, A, B, C, D;
	scanf("%d", &T);
	while (T--) {
		scanf("%d %d %d %d", &A, &B, &C, &D);
		printf("%lld\n", solve(A, B, C, D));
	}
	fflush(stdout);
	return 0;
}