#include <fstream>
#define dim 1010
using namespace std;
char a[dim][dim];
char b[dim][dim];
char f[30];
char l;
int ok[dim][dim];
int d[dim][dim];
int i,j,n,m,sol;
int main() {
    ifstream fin("matrix.in");  ///sunt 26 de litere in alfabet
    ofstream fout("matrix.out");
    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>>b[i][j];
            f[b[i][j]]++;
        }
    }
    for (l='a';l<='z';l++) {
        for (i=1;i<=n;i++) {
            for (j=1;j<=n;j++) {///d este o matrice de sume partiale pentru fiecare litera
                d[i][j]=d[i-1][j]+d[i][j-1]-d[i-1][j-1]+(a[i][j]==l);
            }
        }
        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[l]) ok[i][j]=0;
            }
        }
    }
    for (i=m;i<=n;i++) {
        for (j=m;j<=n;j++) {
            if (ok[i][j]==1) sol++;
        }
    }
    fout<<sol;
   /* for (i=1;i<=m;i++) {
        for (j=1;j<=m;j++) fout<<b[i][j]<<" ";
        fout<<"\n";
    }  */
    return 0;
}