#include <fstream>
using namespace std;

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

int n,m,i,j,f[30],d[1001][1001],sol;
char a[1001][1001],c;
bool ok[1001][1001];

int main(){
    fin>>n>>m;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            fin>>a[i][j],ok[i][j]=1;

    for(i=1;i<=m;i++)
        for(j=1;j<=m;j++)
            fin>>c,f[c-'a'+1]++;

    for(c='a';c<='z';c++){
        for(i=1;i<=n;i++)
            for(j=1;j<=n;j++)
                d[i][j]=(a[i][j]==c)+d[i-1][j]+d[i][j-1]-d[i-1][j-1];

        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[c-'a'+1])
                    ok[i][j]=0;
    }

    for(i=m;i<=n;i++)
        for(j=m;j<=n;j++)
            sol+=ok[i][j];
    fout<<sol;

    return 0;
}