#include <fstream>
using namespace std;
ifstream fcin("matrix.in");
ofstream fout("matrix.out");
char c;
int n,m,x[1001][1001],f[30],nr,d1[1001][1001],d2[1001][1001],s,ss;
int main()
{
    fcin>>n>>m;

    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=n; j++)
        {
            fcin>>c;
            x[i][j]=c-96;
        }
    }
    for(int i=1; i<=m; i++)
    {
        for(int j=1; j<=m; j++)
        {
            fcin>>c;
            f[c-96]++;
            s=s+c-96;
            ss=ss+(c-96)*(c-96);
        }
    }
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=n; j++)
        {
            d1[i][j]=d1[i-1][j]+d1[i][j-1]-d1[i-1][j-1]+x[i][j];
            d2[i][j]=d2[i-1][j]+d2[i][j-1]-d2[i-1][j-1]+x[i][j]*x[i][j];

        }

    }
    for(int i=m; i<=n; i++)
    {
        for(int j=m; j<=n; j++)
        {
            int ok=0;
            int l1=i-m+1;
            int c1=j-m+1;
            int l2=i;
            int c2=j;
                if(d1[l2][c2]-d1[l2][c1-1]-d1[l1-1][c2]+d1[l1-1][c1-1]!=s || d2[l2][c2]-d2[l2][c1-1]-d2[l1-1][c2]+d2[l1-1][c1-1]!=ss)
                {
                    ok=1;
                }

            if(ok==0)
            {
                nr++;
            }
        }
    }
    fout<<nr;
    return 0;
}