#include<fstream.h>
#define dim 4097
int a[dim][dim];
int main()
{ifstream f("triplete.in");
ofstream g("triplete.out");
unsigned long sum=0,n,m,i,j,x,y,k;
f>>n>>m;
for(i=1;i<=m;i++)
 {f>>x>>y;
  a[x][y]=a[y][x]=1;
 }
f.close();
for(i=1;i<=n;i++)
  {for(j=i+1;j<=n;j++)
     if(a[i][j]==1)
       {k=i+1;
	while(k<j)
	 {while((a[k][j]==0)&&(k<j)) k++;
	  if(k<j) if(a[k][i]==1) sum++;
	  k++;
	 }
       }
  }
g<<sum<<'\n';g.close();
return 0;
}