#include <bits/stdc++.h>

using namespace std;

#ifndef LOCAL
#define cerr \
  if (0) cerr
#endif

map<vector<int>, int> dp[185];
int a[185][185];
int n, m;

int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
#ifdef LOCAL
#define task "a"
#else
#define task ""
#endif
  if (fopen(task ".inp", "r")) {
    freopen(task ".inp", "r", stdin);
    freopen(task ".out", "w", stdout);
  }
  cin >> n >> m;
  for (int i = 1; i <= m; i++) {
    for (int j = 0; j < n; j++) {
      cin >> a[i][j];
      --a[i][j];
      // a[i][j]++;
    }
  }
  // dp[i] = tap cac hoan vi khi xet i thang hoan vi dau
  vector<int> p(n);
  iota(p.begin(), p.end(), 0);
  // for (int i : p) cerr << i << ",";
  // cerr << endl;
  for (int i = 1; i <= m; i++) {
    dp[i] = dp[i - 1];
    for (auto [v, _] : dp[i - 1]) {
      vector<int> nv = v;
      for (int j = 0; j < n; j++) {
        nv[j] = v[a[i][j]];
        // if (i == 1) cerr << j << " " << nv[j] << endl;
      }
      dp[i][nv] = 1;
    }
    dp[i][vector<int>(a[i], a[i] + n)] = 1;
  }
  for (auto [v, _] : dp[2]) {
    for (int i : v) cerr << i << " ";
    cerr << endl;
  }
  cout << dp[m].size();
  return 0;
}