#include <fstream>
#include <climits>
#include <algorithm>
#include <cstring>
using namespace std;

ifstream cin("matrix.in");
ofstream cout("matrix.out");

// declaring outside main for zeros
int frB[27],d[1005][1005],ok[1005][1005];
char a[1005][1005],x;
int main()
{
   /// declaring
   int n, m,sol=0,i,j;

   ////reading
   cin >> m >> n;
   for ( i=1;i<=m;i++){
      for (j=1;j<=m;j++){
         cin >> a[i][j];
      }
   }

   for ( i=1;i<=n;i++){
      for (j=1;j<=n;j++){
         cin >> x;
         frB[x-'a']++;
      }
   }
   //initialize
   for ( i=n;i<=m;i++){
      for (j=n;j<=m;j++){
         ok[i][j]=1;
         
      }
   }
   // algorithm
   for (x='a';x<='z';x++){
      //build the frequecy matrix
      for (i=1;i<=m;i++){
         for (j=1;j<=m;j++){
            d[i][j]=d[i-1][j]+d[i][j-1]-d[i-1][j-1]+(x==a[i][j]);
         }
      }
      for (i=n;i<=m;i++){
         for (j=n;j<=m;j++){
            if (frB[x-'a']!=d[i][j]-d[i-n][j]-d[i][j-n]+d[i-n][j-n]){
               ok[i][j]=0;
   
            }
         }
      }}
     for (i=n;i<=m;i++){
         for (j=n;j<=m;j++){
            sol += ok[i][j];
   
            }
         }
      
      cout << sol;
   
}
   // reconstructing and outputting

   //test
  /*for ( i=1;i<=m;i++){
      for (j=1;j<=m;j++){
         cout << ok[i][j]<< " ";
      }
      cout << endl;
   }
    cout << endl;
   for ( i=0;i<26;i++){
      cout << frB[i]<<" ";
   }
  */