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:
import sys

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 19
MOD = 10 ** 9 + 7

def deepcopy(li): return [x[:] for x in li]

def gauss_jordan(A, extended=False):
    """ ガウス・ジョルダン法(連立方程式の解) """

    N, M = len(A), max(A).bit_length()
    B = A[:]
    rank = 0
    res = []
    for col in range(M):
        if extended and col == M-1:
            break
        pivot = -1
        for row in range(rank, N):
            if B[row]>>col & 1:
                pivot = row
                break
        if pivot == -1:
            continue
        B[rank], B[pivot] = B[pivot], B[rank]
        for row in range(N):
            if row != rank and B[row]>>col & 1:
                B[row] ^= B[rank]
        res.append(col)
        rank += 1
    for row in range(rank, N):
        if B[row]>>(M-1) & 1:
            return (-1, [])
    return (rank, res)

for _ in range(INT()):
    N = INT()
    A = LIST()
    S = input()
    M = max(A).bit_length()

    mat = [0] * M
    collen = 1
    for i in range(N-1, -1, -1):
        if S[i] == '0':
            for k in range(M):
                mat[k] |= (A[i]>>k & 1) << collen
            collen += 1
        else:
            cur = mat[:]
            for k in range(M):
                cur[k] |= (A[i]>>k & 1) << collen
            rank, res = gauss_jordan(cur, extended=True)
            if rank == -1:
                print(1)
                break
    else:
        print(0)