import sys
from collections import deque, Counter
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

def solve():
    a, b, c, d = mi()
    if a > b:
        a, b = b, a
        c, d = d, c
    if a <= c and b <= d and c < d:
        print(c - a + d - b)
    elif a <= c and b <= d and c > d:
        print(1 + d + (c - a))
    elif a > c and b > d:
        print(2 + c + d)
    elif a <= c and b > d and c < d:
        if a == 1:
            print(3 + c + d)
        else:
            print(2 + c + d)
    elif a <= c and b > d and c > d:
        print(c - a + 1 + d)
    elif a > c and b <= d and c < d:
        print(1 + c + d - b)
    elif a > c and b <= d and c > d:
        print(2 + c + d)
    else:
        raise Exception

for _ in range(ii()):
    solve()