#include<cstdio>

const int maxn = 1005 ; 
const int maxl = 26 ;

int n,m ;
bool ok[maxn][maxn] ;
char map[maxn][maxn],line[maxn] ;
int frecv[maxl],ap[maxn][maxn] ;

int main()
{

    freopen("matrix.in","r",stdin);
    freopen("matrix.out","w",stdout);
	
    scanf("%d%d\n",&n,&m);

    for(int i=1;i<=n;++i)
        fgets(map[i]+1,1002,stdin);

    for(int i=1;i<=m;++i)
    {
        fgets(line,1002,stdin);
        for(int j=0;j<m;++j)
            ++ frecv[ line[j]-'a' ] ;
    }

    for(int i=0;i<25;++i)
    {
        for(int j=1;j<=n;++j)
		{	
            for(int k=1;k<=n;++k)
			{	
				bool val = ( map[j][k] - 'a' == i ) ;
                ap[j][k] = ap[j-1][k] + ap[j][k-1] - ap[j-1][k-1] + val ;
			}
		}	
        for(int j=m;j<=n;++j)
            for(int k=m;k<=n;++k)
                if( frecv[i] != ap[j][k] - ap[j][k-m] - ap[j-m][k] + ap[j-m][k-m] )
                    ok[j][k] = 1 ;
    }

	int rez = 0 ;
    for(int i=m;i<=n;++i)
        for(int j=m;j<=n;++j)
            if( !ok[i][j] )
                ++rez ;

    printf("%d\n",rez);

    return 0;
	
}