#include<fstream>
#define N 1010
using namespace std;
ifstream f("matrix.in");
ofstream g("matrix.out");
int n,m,i,j,k,sol,ok[N][N],nra[N],d[N][N];
char a[N][N],s[N];
int main()
{
    f>>n>>m;
    for(i=1;i<=n;++i)
    f>>(a[i]+1);
    for(i=1;i<=m;++i)
    {
        f>>(s+1);
        for(j=1;j<=m;++j)
        ++nra[s[j]-'a'];
    }
    for(i=n;i<=m;++i)
    for(j=n;j<=m;++j)
    ok[i][j]=1;
    for(k=0;k<=25;++k)
    {
        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]==k+'a')
            ++d[i][j];
            if(i>=m&&j>=m&&d[i][j]-d[i-m][j]-d[i][j-m]+d[i-m][j-m]!=nra[k])
            if(ok[i][j])
            ++sol,
            ok[i][j]=0;
        }
    }
    g<<(n-m+1)*(n-m+1)-sol<<'\n';
    return 0;
}