#include<fstream>
#include<bitset>
using namespace std;
ifstream in("triplete.in");
ofstream out("triplete.out");
bitset<4099> a[4099];
unsigned int l,i,j,n,x,y,m,q[66000][2];
int main()
{in>>n>>m;
for(i=0;i<m;++i)
  in>>x>>y,a[min(x,y)-1][max(x,y)+1]=1,q[i][0]=x-1,q[i][1]=y-1;
for(i=0;i<m;++i)
  l+=(a[q[i][0]]&a[q[i][1]]).count();
out<<l<<"\n";
return 0;}