#include <bits/stdc++.h>

using namespace std;

constexpr uint64_t mod = 934871235482355131;

int main() {
  cin.tie(0)->sync_with_stdio(0);
  int n, k; cin >> n >> k;
  vector<uint64_t> a(n);
  vector<int> v;
  for (string s; auto& a: a) {
    cin >> s;
    reverse(s.begin(), s.end());
    v.assign(k, 0);
    for (int i = 0; i < s.size(); ++i) v[i % k] += s[i] - '0';
    for (int c = 0; auto& x: v) c += x, x = c % 10, c /= 10;
    reverse(v.begin(), v.end());
    if (*min_element(v.begin(), v.end()) != 9)
    for (auto& c: v) a = (a * 10 + c) % mod;
  }
  uint64_t m = 0, m2;
  int ans = 0;
  while (k--) m = (m * 10 + 9) % mod;
  m2 = 2 * m % mod;
  for (auto& x: a)
  for (auto& y: a) if (&y > &x) break; else
  for (auto& z: a) if (&z > &y) break; else ans += x + y + z == 0 || x + y + z == m || x + y + z == m2;
  cout << ans << '\n';
}