#include <fstream>

using namespace std;

ifstream fin("matrix.in");
ofstream fout("matrix.out");

int n,m,i,j,y,l,k,af,v[30],b[30],a[1005][1005],d[1005][1005];
bool ok[1005][1005];
char c;

int main()
{
    fin >> n >> m;
    for (i=1;i<=n;i++) for (j=1;j<=n;j++)
    {
        fin >> c;
        l=c-'a';
        a[i][j]=l;
    }
    for (i=1;i<=m;i++) for (j=1;j<=m;j++)
    {
        fin >> c;
        l=c-'a';
        if (v[l]==0) b[++k]=l;
        v[l]++;
    }
    for (y=1;y<=k;y++)
    {
        l=b[y];
        for (i=1;i<=n;i++) for (j=1;j<=n;j++)
        {
            d[i][j]=d[i-1][j]+d[i][j-1]-d[i-1][j-1];
            if (l==a[i][j]) d[i][j]++;
            if (i>=m && j>=m)
            {
                if (d[i][j]-d[i-m][j]-d[i][j-m]+d[i-m][j-m]!=v[l]) ok[i][j]=1;
                if (y==k && ok[i][j]==0) af++;
            }
        }
    }
    fout << af;

    return 0;
}