#include <bits/stdc++.h>
#define itrep(itr, st) for(auto itr = st.begin(); itr != st.end(); ++itr)
using namespace std;


int to_num(string s) {
    int ret = 0;
    for(int i = 0; i < (int)s.size(); ++i){
        char c = s[i];
        ret |= (c - '0') << (i * 3);
    }
    return ret;
}


int main(){
    int N, K;   cin >> N >> K;
    vector<int> mag(N);
    for(auto& x : mag){
        string s;   cin >> s;
        x = to_num(s);
    }

    vector<bool> visited(1 << (K * 3));
    for(auto& sv : mag){
        if(visited[sv]){
            continue;
        }
        vector<int> stk = { sv };
        while(!stk.empty()){
            int v = stk[stk.size() - 1];    stk.pop_back();
            for(int i = 0; i < K; ++i){
                int k = i * 3;
                if(((v >> k) & 7) == 0){
                    continue;
                }
                int nv = v - (1 << k);
                if(visited[nv]){
                    continue;
                }
                visited[nv] = true;
                stk.push_back(nv);
            }
        }
    }

    int ans = 0;
    for(auto& x : mag){
        if(!visited[x]){
            continue;
        }
        ++ans;
    }
    cout << ans << endl;

    return 0;
}