#include <fstream>
using namespace std;
int a[1001][500][27], i, j, sol[27], ii, jj, t, m, n, ok, SOL;
char c;
int main ()
{
    ifstream fin ("matrix.in");
    ofstream fout ("matrix.out");
    fin>>m>>n;
    for (i=1; i<=m; i++)
        for (j=1; j<=m; j++)
        {
            fin>>c;
            for (int t=0; t<='z'-'a'; t++)
            a[i][j][t]=a[i][j-1][t]+a[i-1][j][t]-a[i-1][j-1][t]+(t==c-'a');
        }
    for (i=1; i<=n; i++)
        for (j=1; j<=n; j++)
        {
            fin>>c;
            sol[c-'a']++;
        }
    for (i=1; i<=m-n+1; i++)
        for (j=1; j<=m-n+1; j++)
        {
            ii=i+n-1;
            jj=j+n-1;
            ok=1;
            for (t=0; t<='z'-'a'; t++)
                if (a[ii][jj][t]-a[i-1][jj][t]-a[ii][j-1][t]+a[i-1][j-1][t]!=sol[t])
                {
                    ok=0;
                    break;
                }
            SOL+=ok;
        }
    fout<<SOL;

}