#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define nmax 1005

char a[nmax][nmax],b[nmax][nmax];
int t[nmax][nmax],n,m,nrmat,rez[nmax][nmax],lit[26];

void citire()
{
int i,j;

freopen("matrix.in", "r", stdin);
scanf("%d %d",&m,&n);
for (i=1; i<=m; i++)
    gets(a[i]);
for (i=1; i<=n; i++)
    {
    gets(b[i]);
    for (j=0; j<strlen(b[i]); j++)
        lit[int(b[i][j]) - int('0')]+=1;
    }
fclose(stdin);
}


void calc()
{
int i,j,x,c;

for (c=0; i<=26; i++)
    {
    memset(t,0,sizeof(t));
    for (i=0; i<m; i++)
        for (j=0; j<n; j++)
            {
            t[i][j] = t[i-1][j] + t[i][j-1] - t[i-1][j-1];
            if (int(a[i][j])-int ('0') == c)
                                 t[i][j] +=1;
            for (i=n; i <= m ; i++)
                for (j=n; j <= m ; j++ )
                    {
                    x=t[i][j]-t[i-n][j] - t[i-n][j-n];
                    if ( x != lit[c] )
                       rez[i][j]=1;
                    }
            }
     }
for (i=n; i<=m; i++ )
    for (j=n; j<=m; j++)
	if (rez[i][j] == 0)
           nrmat+=1;
}

int main ()
{
citire();
calc();
freopen("matrix.out","w",stdout);
printf("%d",nrmat);
fclose(stdout);
return 0;
}