#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)





int N, M;
int E[100][100];
//-----------------------------------------------------------------
int main() {
	cin >> N >> M;
	rep(i, 0, M) {
		int a, b; cin >> a >> b;
		E[a][b] = E[b][a] = 1;
	}

	int ans = 0;
	rep(i1, 0, N) rep(i2, i1 + 1, N) rep(i3, i2 + 1, N) rep(i4, i3 + 1, N) {
		vector<int> v;
		v.push_back(i1);
		v.push_back(i2);
		v.push_back(i3);
		v.push_back(i4);
		bool ok = false;
		do {
			bool ok2 = true;
			rep(i, 0, 4) {
				int a = v[i], b = v[(i + 1) % 4];
				if (!E[a][b]) ok2 = false;
			}
			if (E[v[0]][v[2]]) ok2 = false;
			if (E[v[1]][v[3]]) ok2 = false;
			if (ok2) ok = true;
		} while(next_permutation(v.begin(), v.end()));
		if (ok) ans++;
	}
	cout << ans << endl;
}