#include <iostream>
#include <iomanip>
using namespace std;
int main() {
    int a[200][200],n=0,m=0,i=0,j=0,c,b;
    cin>>n>>m;
    for(i=0;i<n;i++){
    	for(j=0;j<m;j++){
    		cin>>a[i][j];
    	}
    }
    cin>>c>>b;
    for(i=1;i<n-1;i++){
    	for(j=1;j<m-1;j++){
    		if(a[i][j]==c){
    			if(a[i-1][j]==b||a[i][j-1]==b||a[i][j+1]==b||a[i+1][j]==b){
    				cout<<"Y";
    			}else{
    				cout<<"N";
    			}
    		}
    	}
    }
    return 0;
}
/**************************************************************
	Problem: 2000
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2104 kb
****************************************************************/