include [HTML_REMOVED]

using namespace std;

int main()
{
int n,m;
cin>>n>>m;
vector[HTML_REMOVED]>vec(n,vector[HTML_REMOVED](m));
for(int i=0;i[HTML_REMOVED]>vec[i][j];
}
}
int a,b;
cin>>a>>b;
int hang,lie,one,two,three,four;
for(int i=0;i[HTML_REMOVED]=0) one=vec[hang][lie-1];
if(hang-1>=0) four=vec[hang-1][lie];
if(lie+1<m)two=vec[hang][lie+1];
if(hang+1<n) three=vec[hang+1][lie];

if(one==b||two==b||three==b||four==b) printf("Y");
else printf("N");

}