#include <fstream>

using namespace std;

int n, m;
char a[1005][1005], vax[1005];
int s[1005][1005];
int tot, frv[26];
bool nok[1005][1005];

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

	for (int k = 0; k < 26; ++k)
		for (int i = 1; i <= n; ++i)
			for (int j = 1; j <= n; ++j)
			{
				s[i][j] = s[i - 1][j] + s[i][j - 1] - s[i - 1][j - 1];
				if (a[i][j - 1] == k + 'a') ++s[i][j];
				
				if (i >= m && j >= m)
					if (s[i][j] - s[i - m][j] - s[i][j - m] + s[i - m][j - m] != frv[k])
						nok[i][j] = true;
			}
	for (int i = m; i <= n; ++i)
		for (int j = m; j <= n; ++j)
			tot += (nok[i][j] == false);
	
	fout << tot;
	
	fin.close();
	fout.close();
}