#include <bits/stdc++.h>
#define NMAX 1000
#define MMAX 26
#define ll long long

using namespace std;

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

int n, m, ans;
char c, a[NMAX + 2][NMAX + 2];
int ok[NMAX + 2][NMAX + 2], sp[NMAX + 2][NMAX + 2], fr[MMAX];

int main() {
    ios_base::sync_with_stdio(false);
    fin.tie(NULL);
    fout.tie(NULL);

    fin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            fin >> a[i][j];
        }
    }
    for (int i = 1; i <= m; i++) {
        for (int j = 1; j <= m; j++) {
            fin >> c;
            fr[c - 'a']++;
        }
    }

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

    for (int lit = 0; lit <= 25; lit++) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                sp[i][j] = (a[i][j] - 'a' == lit ? 1 : 0) + sp[i - 1][j] + sp[i][j - 1] - sp[i - 1][j - 1];
            }
        }

        for (int i = m; i <= n; i++) {
            for (int j = m; j <= n; j++) {
                if (sp[i][j] - sp[i - m][j] - sp[i][j - m] + sp[i - m][j - m] != fr[lit]) {
                    ok[i][j] = 0;
                }
            }
        }
    }

    for (int i = m; i <= n; i++) {
        for (int j = m; j <= n; j++) {
            ans += ok[i][j];
        }
    }

    fout << ans;
    return 0;
}