#include <stdio.h>
#include <vector>
#include <set>
using namespace std;
#define fori(it,v) for (typeof ((v).begin()) it=(v).begin();it!=(v).end();++it)
#define pb push_back
#define all(c) c.begin(),c.end()
set<int> b;
vector<set<int> >c(4100);
vector<vector<int> > a(4100);
set<int>::iterator aux;
int e[4100];
int main()
{
	FILE *in,*out;
	int i,m,n,x,y,nr=0;
	in=fopen("triplete.in","r");
	out=fopen("triplete.out","w");
	fscanf(in,"%d%d",&n,&m);
	for (i=1;i!=m;++i)
	{
		fscanf(in,"%d%d",&x,&y);
		aux=c[x].end();
		fori(j,a[y])
			if (c[x].find(*j)!=aux)
				++nr;
		}
		a[x].pb(y);
		a[y].pb(x);
		c[x].insert(y);
		c[y].insert(x);
		
	}
	fprintf(out,"%d\n",nr);
	fclose(in);
	fclose(out);
	return 0;
}