#include <iostream>
#define rep(i, l, r) for(i = l; i < r; i++)
using namespace std;

int n;
bool is_connect[50][50] = {false};

bool check(int a, int b, int c, int d) {
	int i, j;
	int id[4] = {a, b, c, d};
	bool used[4] = {false};
	int now = 0;
	
	used[0] = true;
	rep(i, 0, 3) {
		rep(j, 0, 4) {
			if (used[j] || !is_connect[id[now]][id[j]]) continue;
			used[j] = true;
			now = j;
			break;
		}
		if (j == 4) return false;
	}
	if (!is_connect[id[now]][id[0]]) return false;
	
	rep(i, 0, 4) {
		int cnt = 0;
		rep(j, 0, 4) {
			if (i == j) continue;
			if (is_connect[id[i]][id[j]]) cnt++;
		}
		if (cnt != 2) return false;
	}
	
	return true;
}

int main() {
	int m, a, b;
	int i, j, k, l;
	
	cin >> n >> m;
	rep(i, 0, m) {
		cin >> a >> b;
		is_connect[a][b] = true;
		is_connect[b][a] = true;
	}
	
	int ans = 0;
	rep(i, 0, n)
		rep(j, i + 1, n)
			rep(k, j + 1, n)
				rep(l, k + 1, n)
					ans += check(i, j, k, l);
	cout << ans << endl;
	return 0;
}