#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,i,j,b,c,x,y,z,d;
	cin>>n>>m;
	int a[n][m];
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];
}
    }
    cin>>b>>c;
    
    for(i=0;i<n;i++){
    	for(j=0;j<m;j++){
    		if(a[i][j]==b){
    			x=i;
    			y=j;
    		}
    		if(a[i][j]==c){
    			z=i;
    			d=j;
    		}
    	}
    }
    if((x==z&&y-d==1)||(x==z&&d-y==1)||(y==d&&x-z==1)||(y==d&&z-x==1)){
    	cout<<"Y";
    }else{
    	cout<<"N";
    }
}
/**************************************************************
	Problem: 2000
	User: lvrenxiang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/