#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
  int n = 0, i, j;
  while (cin >> n) {
    if (n == 0) return 0;

    vector<string> words(n, "");
    for (i = 0; i < n; i++)
      cin >> words[i];

    string tiles;
    cin >> tiles;

    int count = 0;
    for (i = 0; i < words.size(); i++) {
      vector<int> freq(256, 0);
      for (j = 0; j < words[i].size(); j++)
	freq[words[i][j]]--;
      for (j = 0; j < tiles.size(); j++)
	freq[tiles[j]]++;

      int blanks = freq['_'];
      for (j = 'A'; j <= 'Z'; j++)
	blanks += min(freq[j], 0);

      if (blanks >= 0)
	count++;
    }

    cout << count << endl;
  }
}