#include <fstream>
#include <string>

using namespace std;

const int NMAX = 1000 + 5;
short freq[NMAX][NMAX][26];

string mat[NMAX];
short freqP[26];

int main()
{
    ifstream cin("matrix.in");
    ofstream cout("matrix.out");

    int N, M;
    cin >> N >> M;

    for (int i = 1; i <= N; ++ i) {
        cin >> mat[i];
        mat[i] = " " + mat[i];
    }

    string pattern;
    for (int i = 1; i <= M; ++ i) {
        cin >> pattern;
        for (auto it: pattern)
            ++ freqP[it - 'a'];
    }

    for (int i = 1; i <= N; ++ i) {
        for (int j = 1; j <= N; ++ j) {
            for (int k = 0; k < 26; ++ k)
                freq[i][j][k] = freq[i - 1][j][k] - freq[i - 1][j - 1][k] + freq[i][j - 1][k];
            ++ freq[i][j][mat[i][j] - 'a'];
        }
    }

    int ans = 0;
    for (int i = 1; i + M - 1 <= N; ++ i)
        for (int j = 1; j + M - 1 <= N; ++ j) {
            bool ok = true;
            for (int k = 0; k < 26 && ok; ++ k) {
                int aux = freq[i + M - 1][j + M - 1][k] + freq[i - 1][j - 1][k] -
                          freq[i + M - 1][j - 1][k]     - freq[i - 1][j + M - 1][k];

                if (aux != freqP[k])
                    ok = false;
            }
            ans += ok;
        }

    cout << ans << '\n';
    return 0;
}