#include <bits/stdc++.h>

using namespace std;

bool g[50][50];

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < m; i++) {
		int a, b;
		cin >> a >> b;
		g[a][b] = true;
		g[b][a] = true;
	}
	int ans = 0;
	for (int i = 0; i < n; i++) {
		for (int j = i + 1; j < n; j++) {
			for (int k = j + 1; k < n; k++) {
				for (int l = k + 1; l < n; l++) {
					int r[4] = {i, j, k, l};
					bool flag = false;
					do {
						bool tmp_flag = true;
						
						for (int idx = 0; idx < 4; idx++) {
							int nex = (idx + 1) % 4;
							if (!g[r[idx]][r[nex]]) {
								tmp_flag = false;
								break;
							}
						}

						tmp_flag &= !g[r[0]][r[2]];
						tmp_flag &= !g[r[1]][r[3]];
						
						if (tmp_flag) {
							flag = true;
							break;
						}
					} while (next_permutation(r, r + 4));
					ans += flag;
				}
			}
		}
	}
	cout << ans << endl;
	return 0;
}