#include<cstdio>

const int N=1010;

int n,m,total;

char s[N];

short int a[N][N][28];
short int virus[28];


int main()
{
	freopen("matrix.in","r",stdin);
	freopen("matrix.out","w",stdout);
	
	scanf("%d%d\n" , &m , &n); 
	
	
	for (int i=1;i<=m;i++)
	{
		gets(s);
		for (int j=0;j<m;j++)
		{
			for (int k=1;k<=27;k++)
				a[i][j+1][k]=a[i][j][k];
			a[i][j+1][s[j]-'a'+1]++;
		}
	}
	
	for (int i=1;i<=m;i++)
	{
		for (int j=1;j<=m;j++)
		{
			for (int k=1;k<=27;k++)
			a[i][j][k]+=a[i-1][j][k];
		}
	}
	

	for (int i=1;i<=n;i++)
	{
		gets(s);
		for (int j=0;j<n;j++)
			virus[s[j]-'a'+1]++;
	}
	
	int i=0;
	for (i=1;i<=m-n+1;i++)
	{
		for (int j=1;j<=m-n+1;j++)
		{
			int nr=0;
			for (int k=1;k<=27;k++)
				if ( a[i+n-1][j+n-1][k] - a[i-1][j+n-1][k] - a[i+n-1][j-1][k] + a[i-1][j-1][k]  == virus [ k ] ) nr++;
			
			if (nr== 27 ) total++;
			
			
		}
		
	}
	
	printf("%d", total);
	
	return 0;
}