for _ in range(int(input())):
    a,b,c,d = map(int,input().split())
    if a>b: a,b,c,d = b,a,d,c
    if c<a and d<b: print(1+c+1+d)
    elif d<c: print(c-a+1+d)
    elif a<=c and b<=d: print(c-a+d-b)
    elif b<=d: print(1+c+d-b)
    else: print((a==1)+1+c+1+d)