#include <bits/stdc++.h>

using namespace std;
using i64 = long long;

const int mod = 1e9 + 7;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, m;
    cin >> n >> m;
    vector<vector<int>> a(m + 1, vector<int>(n + 1));
    for (int i = 1; i <= m; i++) {
        for (int j = 1; j <= n; j++) {
            cin >> a[i][j];
        }
    }

    set<vector<int>> s1, s2;
    vector<int> res(n + 1);
    for (int i = 1; i <= m; i++) {
        s2 = s1;
        s1.insert(a[i]);
        for (auto v : s2) {
            for (int j = 1; j <= n; j++) {
                res[j] = v[a[i][j]];
            }
            s1.insert(res);
        }
    }
    cout << s1.size() % mod << '\n';

    return 0;
}