mod = 998244353


def main():
    import sys
    input = sys.stdin.readline

    for _ in range(int(input())):
        a, b, c, d = map(int, input().split())
        if a > c and b > d:
            print(c + d + 2)
        elif a < c and b < d:
            if (a - b) * (c - d) > 0:
                print(c - a + d - b)
            else:
                if a < b:
                    print(c - a + d + 1)
                else:
                    print(d - b + c + 1)
        else:
            if (a - b) * (c - d) > 0:
                if a < b:
                    if d >= b:
                        print(1 + d - b + c)
                    else:
                        if a == 1:
                            print(3 + c + d)
                        else:
                            print(2 + c + d)
                else:
                    if c >= a:
                        print(1 + c - a + d)
                    else:
                        if b == 1:
                            print(3 + c + d)
                        else:
                            print(2 + c + d)
            else:
                if a > b:
                    if d >= b:
                        print(1 + d - b + c)
                    else:
                        print(2 + c + d)
                else:
                    if c >= a:
                        print(1 + c - a + d)
                    else:
                        print(2 + c + d)


if __name__ == '__main__':
    main()