#include <stdio.h>

int main () {
  int n = 0;
  int k = 0;
  char s[9] = "";
  
  int res = 0;
  
  int ans = 0;
  int val[200000] = {};
  int cnt[400000] = {};
  
  int pow[9] = {};
  
  res = scanf("%d", &n);
  res = scanf("%d", &k);
  for (int i = 0; i < n; i++) {
    res = scanf("%s", s);
    for (int j = 0; j < k; j++) {
      val[i] = val[i]*5+4-((int)(s[j]-'0'));
    }
    cnt[val[i]]++;
  }
  
  pow[0] = 1;
  for (int i = 1; i <= k; i++) {
    pow[i] = pow[i-1]*5;
  }
  
  for (int i = 0; i < k; i++) {
    for (int j = 0; j < pow[k]; j++) {
      if ((j/pow[i])%5 > 0) {
        cnt[j] += cnt[j-pow[i]];
      }
    }
  }
  
  for (int i = 0; i < n; i++) {
    if (cnt[val[i]] > 1) {
      ans++;
    }
  }
  
  printf("%d\n", ans);
  return 0;
}