#include <fstream>
#define DIM 1001
using namespace std;
ifstream fin("matrix.in");
ofstream fout("matrix.out");
int n,m,sol,f[26],a[DIM][DIM],d[DIM][DIM];
bool b[DIM][DIM];
char ch;
int main() {
    fin>>n>>m;
    for (int i=1;i<=n;i++)
        for (int j=1;j<=n;j++) {
            fin>>ch;
            a[i][j]=ch-'a';
        }
    for (int i=1;i<=m;i++)
        for (int j=1;j<=m;j++) {
            fin>>ch;
            f[ch-'a']++;
        }
    for (int i=m;i<=n;i++)
        for (int j=m;j<=n;j++)
            b[i][j]=1;
    for (int k=0;k<26;k++) {
        for (int i=1;i<=n;i++)
            for (int 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]==k)
                    d[i][j]++;
            }
        for (int i=m;i<=n;i++)
            for (int j=m;j<=n;j++)
                if (d[i][j]-d[i-m][j]-d[i][j-m]+d[i-m][j-m]!=f[k])
                    b[i][j]=0;
    }
    for (int i=m;i<=n;i++)
        for (int j=m;j<=n;j++)
            sol+=b[i][j];
    fout<<sol;
    return 0;
}