#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m,i,j,b,o,a[200][200]={0};
	cin>>n>>m;
	int b1,b2,o1,o2;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];
		}
	}
	cin>>b>>o;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			if(a[i][j]==b){
				b1=i;
				b2=j;
			}	
			if(a[i][j]==o){
				o1=i;
				o2=j;
			}	
		}
	}
	if((b1==o1&&abs(b2-o2)==1)||(b2==o2&&abs(b1-o1)==1))
		cout<<"Y";
	else
		cout<<"N";
	return 0;
}
/**************************************************************
	Problem: 2000
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2108 kb
****************************************************************/