#include <stdio.h>
#include <vector>
#include <queue>
#include <stack>
#include <list>
#include <set>
#include <algorithm>
#include <utility>
#include <string>
#include <functional>
#include <sstream>
#include <fstream>
using namespace std;
#define FOR(i,a,b) for (typeof a i=a;i<=b;i++)
#define fori(it,v) for (typeof ((v).begin()) it=(v).begin();it!=(v).end();it++)
#define pb push_back
#define mp make_pair
#define fs first
#define ss second
#define all(c) c.begin(),c.end()
#define pf push_front
#define popb pop_back
#define popf pop_front
vector<vector<bool> > a(4098,vector<bool>(4098,0));
int main()
{
	int n,m,nr=0,x,y;
	FILE *in,*out;
	in=fopen("triplete.in","r");
	out=fopen("triplete.out","w");
	fscanf(in,"%d%d",&n,&m);
	FOR(i,1,m)
	{
		fscanf(in,"%d%d",&x,&y);
		if(!a[x][y])
			FOR(j,1,n)
				if (a[x][j]&&a[y][j])
				{
					nr++;
					break;
				}
		a[x][y]=1;
		a[y][x]=1;
	}
	fprintf(out,"%d\n",nr);
	fclose(in);
	fclose(out);
	return 0;
}