#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("matrix.in");
ofstream fout("matrix.out");
int i,n,m,j,ok[1005][1005],f[100],t,s[1005][1005],sum;
char a[1005][1005],b[1005][1005],maxim;
int main(){
    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]-'a'+1]++;
            if(maxim<b[i][j]){
                maxim=b[i][j];
            }
        }
    }
    for(t=1;t<=maxim-'a'+1;t++){
        memset(s,0,sizeof(s));
        for(i=1;i<=n;i++){
            for(j=1;j<=n;j++){
                s[i][j]=s[i][j-1]+s[i-1][j]-s[i-1][j-1];
                if(a[i][j]-'a'+1==t){
                    s[i][j]++;
                }
            }
        }
        for(i=m;i<=n;i++){
            for(j=m;j<=n;j++){
                if(( s[i][j] - s[i-m][j] - s[i][j-m] + s[i-m][j-m]) != f[t]){
                    ok[i][j]=0;
                }
            }
        }
    }
    for(i=m;i<=n;i++){
        for(j=m;j<=n;j++){
            sum+=ok[i][j];
        }
    }
    fout<<sum<<"\n";
    return 0;
}