#include <fstream>

using namespace std;

char a[1010][1010], c;
int d[1010][1010], sol, n, m, ok[1010][1010], f[130];

int main() {
    ifstream fin("matrix.in");
    ofstream fout("matrix.out");
    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;
            f[c]++;
        }
    }
    for (int i = m; i <= n; i++) {
        for (int j = m; j <= n; j++) {
            ok[i][j] = 1;
        }
    }
    for (char c = 'a'; c <= 'z'; c++) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                d[i][j] = (a[i][j] == c) + d[i - 1][j] + d[i][j - 1] - d[i - 1][j - 1];
            }
        }
        for (int i = m; i <= n; i++) {
            for (int j = m; j <= n; j++) {
                if (d[i][j] - d[i - m][j] - d[i][j - m] + d[i - m][j - m] != f[c]) {
                    ok[i][j] = 0;
                }
            }
        }
    }
    for (int i = m; i <= n; i++) {
        for (int j = m; j <= n; j++) {
            sol += ok[i][j];
        }
    }
    fout << sol;
    return 0;
}