/*#include<cstdio>
int nr,n,m,fr[30],spart[1005][1005];
bool ok[1005][1005];
char a[1005][1005],ss[1005];
void citire()
{
	freopen("matrix.in","r",stdin);
    freopen("matrix.out","w",stdout);
	scanf("%d%d\n",&n,&m);
	for (int i=1;i<=n;++i)
		gets(a[i]+1);
	for (int i=1;i<=m;++i)
	{
		gets(ss);
		for (int i=0;i<m;++i)
			fr[ss[i]-'a'+1]++;
	}
}

void init()
{
	for (int i=m;i<=n;++i)
		for (int j=m;j<=n;++j)
			ok[i][j]=true;
}

void initspart()
{
	for (int i=1;i<=n;++i)
		for (int j=1;j<=n;++j)
			spart[i][j]=0;
}

int main ()
{
	citire();
	init();
	for (int k=1;k<=26;k++)
	{
		initspart();
		for (int i=1;i<=m;i++)
			for (int j=1;j<=m;j++)
			{
				spart[i][j]=spart[i-1][j]+spart[i][j-1]-spart[i-1][j-1];
				if (a[i][j]-'a'+1==k)
					++spart[i][j];
			}
		for (int i=n;i<=m;i++)
			for (int j=n;j<=m;j++)
				if (ok[i][j] && spart[i][j]-spart[i-n][j]-spart[i][j-n]+spart[i-n][j-n]!=fr[k])
					ok[i][j]=0;
	}
	for (int i=1;i<=m;i++)
        for (int j=1;j<=m;j++)
			if (ok[i][j])
				++nr;
	printf("%d\n",nr);
	return 0;
}

*/
#include<cstdio>
int nr,m,n,k,x[31],xx[1001][1001];
char sx[1001],a[1001][1001];
bool da[1001][1001];
int main()
{
	freopen("matrix.in","r",stdin);
	freopen("matrix.out","w",stdout);
	scanf("%d%d\n",&m,&n);
	int i,j;
	for(i=1;i<=m;++i)
		gets(a[i]+1);
	for(i=1;i<=n;++i)
	{
		gets(sx);
		for(j=0;j<n;++j)
			x[sx[j]-96]++;
	}
	for (i=n;i<=m;++i)
		for (j=n;j<=m;++j)
			da[i][j]=true;
	for(k=1;k<=26;k++)
	{
		for(i=1;i<=m;i++)
			for(j=1;j<=m;j++)
				xx[i][j]=0;
		for (i=1;i<=m;i++)
			for (j=1;j<=m;j++)
			{
				xx[i][j]=xx[i-1][j]+xx[i][j-1]-xx[i-1][j-1];
				if (a[i][j]-'a'+1==k)
					++xx[i][j];
			}
		for (i=n;i<=m;i++)
			for (j=n;j<=m;j++)
				if (da[i][j] && xx[i][j]-xx[i-n][j]-xx[i][j-n]+xx[i-n][j-n]!=x[k])
					da[i][j]=0;
	}
	nr=0;
	for (i=1;i<=m;i++)
        for (j=1;j<=m;j++)
			if (da[i][j])
				++nr;
	printf("%d\n",nr);
	return 0;
}