#include <fstream>

using namespace std;

ifstream fin("matrix.in");
ofstream fout("matrix.out");

int n, m, i, j, d[1002][1002], sol, f[200];
char c, v[1002][1002], ok[1002][1002];

int main(){
    fin>>n>>m;

    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++){
            fin>>v[i][j];
            ok[i][j] = 1;
        }
     for(i=1;i<=m;i++)
        for(j=1;j<=m;j++){
            fin>>c;
            f[c] ++;
        }
    for(c = 'a';c <= 'z';c++){
        for(i=1;i<=n;i++)
            for(j=1;j<=n;j++)
                d[i][j] = 0;
        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(v[i][j] == c)
                    d[i][j] ++;
            }
        for(i=m;i<=n;i++)
            for(j=m;j<=n;j++)
                if(ok[i][j] == 1)
                    if(d[i][j] - d[i][j-m] - d[i-m][j] + d[i-m][j-m] != f[c])
                        ok[i][j] = 0;
    }
    for(i=m;i<=n;i++)
        for(j=m;j<=n;j++)
            sol += ok[i][j];
    fout<<sol;
    return 0;
}