import sys
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
    
    ta = False
    tb = False
    if a >= c:
        ta = True
    if b >= d:
        tb = True
    if c > d:
        tb = True
    ans = 0
    if ta:
        ans += 1 + c
    else:
        ans += c - a
    if tb:
        ans += 1 + d
    else:
        ans += d - b
    print(ans)
for _ in range(ii()):
    solve()