#include <iostream>
using namespace std;
int main()
{
    int n,m,a[999][999],d,b;
    bool c=0;
    cin >> n >> m;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            cin >> a[i][j];
        }
    }
    cin >> d >> b;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            if(a[i][j]==d)
            {
                if(a[i+1][j]==b || a[i-1][j]==b || a[i][j+1]==b || a[i][j-1]==b)
                {
                    c=1;
                    break;
                }
            }
        }
    }
    if(c)
    {
        cout << "Y";
    }
    else
    {
        cout << "N";
    }
}