#include<bits/stdc++.h>
using namespace std;
int n,m,x,y,a[105][105],s;
int main()
{
    cin>>n>>m>>x>>y;
    for(int i=0;i<=n;i++)
        for(int j=0;j<=m;j++)
            a[i][j]=0;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m;j++)
            cin>>a[i][j];
    x++,y++;
    s+=a[x-1][y-1]+a[x-1][y]+a[x-1][y+1];
    s+=a[x][y-1]+a[x][y+1];
    s+=a[x+1][y-1]+a[x+1][y]+a[x+1][y+1];
    cout<<s;
    return 0;
}