#include<bits/stdc++.h>
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: panjinyan
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2108 kb
****************************************************************/