Problem: There are two persons, numbered 0 and 1, and a variable x whose initial value is 0. The two persons now play a game. The game is played in N rounds. The following should be done in the i-th round (1 \leq i \leq N):

* Person S_i does one of the following:
* Replace x with x \oplus A_i, where \oplus represents bitwise XOR.
* Do nothing.



Person 0 aims to have x=0 at the end of the game, while Person 1 aims to have x \neq 0 at the end of the game.

Determine whether x becomes 0 at the end of the game when the two persons play optimally.

Solve T test cases for each input file.

Constraints

* 1 \leq T \leq 100
* 1 \leq N \leq 200
* 1 \leq A_i \leq 10^{18}
* S is a string of length N consisting of `0` and `1`.
* All numbers in input are integers.

Input

Input is given from Standard Input in the following format. The first line is as follows:


T


Then, T test cases follow. Each test case is given in the following format:


N
A_1 A_2 \cdots A_N
S


Output

For each test case, print a line containing `0` if x becomes 0 at the end of the game, and `1` otherwise.

Example

Input

3
2
1 2
10
2
1 1
10
6
2 3 4 5 6 7
111000


Output

1
0
0

Solution (in PYTHON3):

Solution:
T = int(input())

for _ in range(T):
    N = int(input())
    A = list(map(int,input().split()))
    S = input()

    if S[-1] == '1':
        print(1)
        continue

    list0 = [0] * 64

    for a, s in zip(A[::-1], S[::-1]):
        blen = a.bit_length()
        for i in range(blen, 0, -1):
            if a.bit_length() < i: continue
            if list0[i - 1]:
                a ^= list0[i - 1]
                if a == 0: break

        else:
            if s == '1':
                ans = 1
                break
            else:
                list0[a.bit_length() - 1] = a

    else:
        ans = 0

    print(ans)