#include<stdio.h>
#define NMAX 4000
int y[NMAX],z[NMAX],B,a,b,n,m,i,j,k,s,x[NMAX][NMAX];
int main()
{
	freopen("triplete.in","r",stdin);
	freopen("triplete.out","w",stdout);
	scanf("%d%d",&n,&m);
	for (i=1;i<=m;i++)
	{
		scanf("%d%d",&a,&b);
		x[a][b>>3]=x[a][b>>3]|(1<<(b&7));
		y[i]=a;
		z[i]=b;
		if (b>k)
			k=b;
	}
	for (i=1;i<=m;i++)
	{
		for (j=1;j<=n;j++)
			if (j!=y[i]&&j!=z[i])
			{

					if (x[y[i]][j>>3]&x[z[i]][j>>3])
                    	s++;

			}
	}
	printf("%d\n",s/2);


	return 0;
}