#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: chenjiahui
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/