import java.io.* ;
public class scrabble {
   public static void main(String[] args) throws Exception {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in)) ;
      while (true) {
         String[] f = br.readLine().split(" ") ;
         int n = Integer.parseInt(f[0]) ;
         if (n == 0)
            break ;
         int[][] b = new int[n][26] ;
         for (int i=0; i<n; i++)
            for (char c : br.readLine().toCharArray())
               b[i][c-'A']++ ;
         int[] pop = new int[256] ;
         for (char c : br.readLine().toCharArray())
            pop[c]++ ;
         int r = 0 ;
         for (int i=0; i<n; i++) {
            int wcn = 0 ;
            for (int j=0; j<26; j++)
               wcn += Math.max(0, b[i][j] - pop[j+'A']) ;
            if (wcn <= pop['_'])
               r++ ;
         }
         System.out.println(r) ;
      }
   }
}