#include <fstream>
#include <bitset>

#define MAX 65580
#define NMAX 5005
using namespace std;

ifstream fin("triplete.in");
ofstream fout("triplete.out");

struct chestie{
    int x, y;
}v[MAX];

bitset<NMAX> vec[NMAX];
int rez;

int main()
{
    int n, m;
    fin >> n >> m;

    for(int i = 1; i <= m; ++i){
        fin >> v[i].x >> v[i].y;

        vec[v[i].x][v[i].y] = 1;
    }

    for(int i = 1; i <= m; ++i)
        rez += (vec[v[i].x] & vec[v[i].y]).count();

    fout << rez << '\n';
    return 0;
}