#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,m,i,a[100][100],j,sp,se;
	cin>>n>>m;
	bool l=0;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];		
		}
	}
	cin>>sp>>se;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			if(a[i][j]==sp){
				if(a[i-1][j]==se||a[i+1][j]==se||a[i][j-1]==se||a[i][j+1]==se){
					cout<<"Y";
					l=1;
					break;
				}
			}				
		}
	}
	if(l==0)
		cout<<"N";
	return 0;
	}

/**************************************************************
	Problem: 2000
	User: fzy001
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/