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#include<iostream>

using namespace std;

int mover[4]={-1,0,1,0};
int movec[4]={0,1,0,-1};

class queue{
	int front;
	int rear;
	int mang[10000];
public:
	queue(){
		rear=-1;
		front=-1;
	}
	
	int isempty(){
		if(rear==front) return 1;
		return 0;
	}
	int isfull(){
		if(rear==9999) return 1;
		return 0;
	}
	void insert(int i){
		rear++;
		mang[rear]=i;
	}
	void pop(){
		if(isempty()==0) front++;
	}
	int peek(){
		return mang[front+1];;
	}
};

int main(){
	freopen("input.txt","r",stdin);
	int t,m,n,a,b,ans;
	int map[105][105];
	int check[105][105];
	cin >> t;
	for(int tc=1;tc<=t;tc++){
		queue queue1;
		queue queue2;
		cin >> n >> m;
		for(int i=0;i<m;i++){
			for(int j=0;j<n;j++) {
				cin >> map[i][j];
				check[i][j]=0;
			}
		}
		cin >> a >> b;
		check[a][b]=1;
		for(int h=0;h<4;h++){
			int x=a; int y=b;
			x+=mover[h];
			y+=movec[h];
			if(x>=0 && x<m && y>=0 && y<n && map[x][y]==1) {
				map[x][y]=map[a][b]+1;
				queue1.insert(x);
				queue2.insert(y);
				check[x][y]=1;
			}
		}
		while(true){
			for(int h=0;h<4;h++){
				int x=queue1.peek(); int y=queue2.peek();
				x+=mover[h];
				y+=movec[h];
				if(x>=0 && x<m && y>=0 && y<n && map[x][y]==1 && check[x][y]==0){
					map[x][y]=map[queue1.peek()][queue2.peek()]+1;
					check[x][y]=1;
					queue1.insert(x);
					queue2.insert(y);
				}
			}
			queue1.pop();
			queue2.pop();
			if(queue1.isempty()==1) break;
		}
		ans=0;
		for(int i=0;i<m;i++){
			for(int j=0;j<n;j++){
				if(map[i][j]>ans) ans=map[i][j];
			}
		}
		cout << ans << endl;
	}



	return 0;
}
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