import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int k = sc.nextInt();
        int[] pows = new int[k + 1];
        pows[0] = 1;
        for (int i = 1; i <= k; i++) {
            pows[i] = pows[i - 1] * 5;
        }
        int size = pows[k];
        ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
        for (int i = 0; i < size; i++) {
            graph.add(new ArrayList<>());
        }
        for (int i = 0; i < size; i++) {
            int x = i;
            for (int j = 0; j < k; j++) {
                if (x % 5 < 4) {
                    graph.get(i + pows[j]).add(i);
                }
                x /= 5;
            }
        }
        int[] points = new int[size];
        int[] idxes = new int[n];
        for (int i = 0; i < n; i++) {
            char[] inputs = sc.next().toCharArray();
            for (int j = 0; j < k; j++) {
                idxes[i] += pows[j] * (inputs[j] - '0');
            }
            points[idxes[i]] = 1;
        }
        int ans = 0;
        for (int i = size - 1; i >= 0; i--) {
            for (int x : graph.get(i)) {
                points[x] += points[i];
                if (points[x] > 2) {
                    points[x] = 2;
                }
            }
        }
        for (int i = 0; i < n; i++) {
            if (points[idxes[i]] > 1) {
                ans++;
            }
        }
        System.out.println(ans);
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}