#include <fstream>

using namespace std;

int n, m;
char a[1005][1005], vax[1005];
short s[1005][1005][26];
int tot, frv[26], fr[26];

bool cmp()
{
	for (int i = 0; i < 26; ++i)
		if (fr[i] != frv[i])
			return false;
	return true;
}

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

	fin >> n >> m;
	fin.getline(a[0], 1002);

	for (int i = 1; i <= n; ++i)
	{
		fin.getline(a[i], 1002);
		for (int j = 0; j < n; ++j)
		{
			for (int k = 0; k < 26; ++k)
				s[i][j + 1][k] = s[i - 1][j + 1][k] + s[i][j][k] - s[i - 1][j][k];
			++s[i][j + 1][a[i][j] - 'a'];
		}
	}
	for (int i = 1; i <= m; ++i)
	{
		fin.getline(vax, 1002);
		for (int j = 0; j < m; ++j)
			++frv[vax[j] - 'a'];
	}

	for (int i = m; i <= n; ++i)
		for (int j = m; j <= n; ++j) // COR = s[i][j] - s[i - m][j] - s[i][j - m] + [i - m][j - m]
		{
			for (int k = 0; k < 26; ++k)
				fr[k] = s[i][j][k] - s[i - m][j][k] - s[i][j - m][k] + s[i - m][j - m][k];
			if (cmp()) ++tot;
		}

	fout << tot;

	fin.close();
	fout.close();
}