#include <fstream>
using namespace std;

ifstream f("matrix.in");
ofstream g("matrix.out");
int n,m,s1,s2,nr,a[1001][1001],b[1001][1001],x;
char c;

int main()
{
    f>>n>>m;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=n; j++)
        {
            f>>c;
            x=c-'a'+1;
            a[i][j]=a[i-1][j]+a[i][j-1]-a[i-1][j-1]+x;
            b[i][j]=b[i-1][j]+b[i][j-1]-b[i-1][j-1]+x*x;
        }

    for(int i=1; i<=m; i++)
        for(int j=1; j<=m; j++)
        {
            f>>c;
            x=c-'a'+1;
            s1=s1+x;
            s2=s2+x*x;
        }

    for(int i=m; i<=n; i++)
        for(int j=m; j<=n; j++)
            if(a[i][j]-a[i-m][j]-a[i][j-m]+a[i-m][j-m]==s1 && b[i][j]-b[i-m][j]-b[i][j-m]+b[i-m][j-m]==s2)
                nr++;
    g<<nr;
    return 0;
}