#include <bits/stdc++.h>
using namespace std;
int mp[55][55],ans,n,m,x,y;
bool check(int a,int b,int c,int d){
	if (mp[a][b]+mp[a][c]+mp[a][d]==3) return 0;
	if (mp[a][b]+mp[b][c]+mp[b][d]==3) return 0;
	if (mp[a][c]+mp[b][c]+mp[c][d]==3) return 0;
	if (mp[a][d]+mp[b][d]+mp[c][d]==3) return 0;
	if (mp[a][b]+mp[a][c]+mp[a][d]+mp[b][c]+mp[b][d]+mp[c][d]==4) 
	{
		//cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'; 
		return 1;
	}
	return 0;
}
signed main ()
{
	cin>>n>>m;
	for (int i=1;i<=m;i++){
		cin>>x>>y;
		mp[x][y]++;
		mp[y][x]++;
	}
	for (int a=0;a<=n;a++)
		for (int b=a+1;b<=n;b++)
			for (int c=b+1;c<=n;c++)
				for (int d=c+1;d<=n;d++){
					if (check(a,b,c,d)) ans++;
				}
	cout<<ans;
	return 0;
}