#include <fstream>
using namespace std;
ifstream cin("matrix.in");
ofstream cout("matrix.out");
int n,m,i,j,d[1001][1001],f[130],sol;
char a[1001][1001],ch;
bool ok[1001][1001];
int main()
{
    cin>>n>>m;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
             cin>>a[i][j];
    for(i=1;i<=m;i++)
         for(j=1;j<=m;j++){
                cin>>ch;
                f[ch]++;
         }
    for(i=m;i<=n;i++)
        for(j=m;j<=n;j++)
            ok[i][j]=1;
    for(ch='a';ch<='z';ch++){
        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(a[i][j]==ch)
                    d[i][j]++;
            }
        for(i=m;i<=n;i++)
             for(j=m;j<=n;j++)
                  if(d[i][j]-d[i-m][j]-d[i][j-m]+d[i-m][j-m]!=f[ch])
                      ok[i][j]=0;
    }
    for(i=m;i<=n;i++)
        for(j=m;j<=n;j++)
             sol+=ok[i][j];
    cout<<sol;
    return 0;
}