def solve():
    a,b,c,d = map(int,input().split())

    if a < b:
        a,b = b,a
        c,d = d,c

    if c > d:
        if c >= a and d >= b:
            return c+d-a-b
        if c >= a and d <= b:
            return d+1+c-a
        
        if b > 1:
            return 3+c-1+d
        else:
            return 4+c-1+d
    else:
        if d >= b:
            return 1+c+d-b
        else:
            return 3+d-1+c


t = int(input())
for _ in range(t):
    print(solve())