#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("matrix.in");
ofstream fout("matrix.out");
char x;
int n,m,s1[1001][1001],s2[1001][1001],sum1,sum2,nr;
int main()
{
    fin>>n>>m;
    for (int i=1;i<=n;i++)
        for (int j=1;j<=n;j++)
           {
               fin>>x;
               s1[i][j]=x-'a'+s1[i-1][j]+s1[i][j-1]-s1[i-1][j-1];
               s2[i][j]=(x-'a')*(x-'a')+s2[i-1][j]+s2[i][j-1]-s2[i-1][j-1];
           }

    for (int i=1;i<=m;i++)
        for (int j=1;j<=m;j++)
    {
        fin>>x;
        sum1+=(x-'a');
        sum2+=(x-'a')*(x-'a');
    }
    //cout<<sum1<<" "<<sum2;
    for (int i=1;i<=n-m+1;i++)
        for (int j=1;j<=n-m+1;j++)
    {
        int k=i+m-1,p=j+m-1;
        int v1=s1[k][p]-s1[k][j-1]-s1[i-1][p]+s1[i-1][j-1];
        int v2=s2[k][p]-s2[k][j-1]-s2[i-1][p]+s2[i-1][j-1];
        //cout<<v1<<" "<<v2<<'\n';
        if (sum1==v1 && sum2==v2) nr++;//,cout<<i<<" "<<j<<" "<<k<<" "<<p<<'\n';
    }
    fout<<nr;
    return 0;
}