#include <fstream>
#include <iostream>
#include <vector>
using namespace std;
ifstream fin ("matrix.in");
ofstream fout("matrix.out");
vector <char> L;
int n,m,i,j,t,sol,f[260],ok[1010][1010],d[1010][1010];
char ch,a[1010][1010];
int main (){
    fin>>n>>m;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            fin>>a[i][j];
    for (i=1;i<=m;i++)
        for(j=1;j<=m;j++) {
            fin>>ch;
            if(!f[ch])
                L.push_back(ch);
            f[ch]++;
        }

    for (i=m;i<=n;i++)
        for (j=m;j<=n;j++)
            ok[i][j]=1;

    for (t=0;t<L.size();t++){
            ch=L[t];
        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];

    fout<<sol;

    return 0;
}