import sys
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

for _ in range(ni()):
    a,b,c,d = na()
    if c > d:
        c, d = d, c
        a,b = b, a
    if a <= c and b <= d and a < b:
        print(d-b+c-a)
    elif b > d:
        if a == 1:
            print(d + c + 3)
        else:
            print(d + c + 2)
    elif a > c:
        print(1 + c + d - b)
    elif b < a:
        print(1 + c + d - b)