def solve():
    SX, SY, TX, TY = map(int, input().split())

    dy = abs(TY - SY)
    y = max(SY, TY)
    sx, tx = min(SX, TX), max(SX, TX)
    if y > 63:
        ans = dy
    else:
        m = (1 << y)
        ans = dy + tx // m - sx // m
    print(ans)

if __name__ == "__main__":
    T = int(input())
    for _ in range(T):
        solve()