#include <bits/stdc++.h>

using namespace std;

vector <int> adj[50];

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

	int n, m, a, b;

	cin >> n >> m;

	for (int i = 0; i < m; i++)
	{
		cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}

	int res = 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++)
				{
					bool ok = true;
					vector <int> v = { i,j,k,l };
					for (int a = 0; a < 4; a++)
					{
						int cnt = 0;
						for (auto b : adj[v[a]])
						{
							if (b == v[0] || b == v[1] || b == v[2] || b == v[3]) cnt++;
						}
						if (cnt != 2)
						{
							ok = false;
							break;
						}
					}
					if (ok)
					{
						res++;
					}
				}
			}
		}
	}

	cout << res << '\n';

	return 0;
}