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 CPP):

Solution:
#include<bits/stdc++.h>
#define cs const
#define pb push_back
using namespace std;
typedef long long ll;
cs int N = 205, M = 65;
int T, n; ll a[N], b[M];
char S[N];
void ins(ll x){
	for(int i=60;~i;i--)
	if(x>>i&1){
		if(b[i])x^=b[i]; 
		else return b[i]=x,void();
	}
} bool chk(ll x){
	for(int i=60;~i;i--)
	if(x>>i&1){
		if(b[i])x^=b[i];
		else return true;
	} return false;
}
void Main(){
	scanf("%d",&n);
	memset(b,0,sizeof(b));
	for(int i=1; i<=n; i++)
	scanf("%lld",&a[i]);
	scanf("%s",S+1);
	for(int i=n; i>=1; i--){
		if(S[i]=='0')ins(a[i]);
		else if(chk(a[i])) 
		return puts("1"),void();
	} puts("0"); 
}
int main(){
	#ifdef FSYolanda
	freopen("1.in","r",stdin);
	#endif
	scanf("%d",&T);
	while(T--)Main();
	return 0;
}