#include<fstream>
#include<bitset>

using namespace std;

const char iname[]="triplete.in";
const char oname[]="triplete.out";
const int maxn=4096;

ifstream f(iname);
ofstream g(oname);

bitset<maxn> a[maxn];

int i,j,n,x,y,m;

unsigned int rez;

int main()
{
    f>>n>>m;
    for(i=0;i<m;++i)
        f>>x>>y,a[min(x,y)-1][max(x,y)+1]=1;
    for(i=0;i<n;++i)
        for(j=i+1;j<n;++j)
            rez+=(a[i]&a[j]).count();
    g<<rez<<"\n";
}