#include <fstream>
#include <vector>
#include <iostream>
using namespace std;

int n, m;
int fr[26];
int cur[26];
unsigned short dp[1001][1001][26];

void read() {
    int i, j, k;
    char ch;
    ifstream f("matrix.in");
    f >> n >> m;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= n; j++) {
            f >> ch;
            dp[i][j][ch - 'a']++;
        }
    for (i = 1; i <= m; i++)
        for (j = 1; j <= m; j++) {
            f >> ch;
            fr[ch - 'a']++;
        }
    f.close();
}

int cnt;

void solve() {
    int i, j, k;
    bool ok;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= n; j++)
            for (k = 0; k <= 25; k++)
                dp[i][j][k] = dp[i][j][k] + dp[i - 1][j][k] + dp[i][j - 1][k] - dp[i - 1][j - 1][k];
    for (i = m; i <= n; i++)
        for (j = m; j <= n; j++) {
            ok = 1;
            for (k = 1; k <= 25 && ok; k++) {
                cur[k] = dp[i][j][k] - dp[i - m][j][k] - dp[i][j - m][k] + dp[i - m][j - m][k];
                if (cur[k] != fr[k])
                    ok = 0;
            }
            if (ok)
                cnt++;
        }
}

void output() {
    ofstream g("matrix.out");
    g << cnt;
    g.close();
}

int main() {
    read();
    solve();
    output();
    return 0;
}