#include <fstream>
#include <algorithm>
#include <vector>
using namespace std;
ifstream fin ("triplete.in");
ofstream fout ("triplete.out");
int N, M, x, y, a, b, sol;
vector < int > V[4100];
bool fr[4100][4100];

int main()
{
    fin >> N >> M;
    for (int i = 1; i <= M; i++)
    {
        fin >> x >> y;
        fr[x][y] = fr[y][x] = 1;
        V[x].push_back(y);
        V[y].push_back(x);
    }

    for (int i = 1; i <= N; i++)
    {
        for (int j = 0; j < V[i].size(); j++)
        {
            if (fr[i][V[i][j]])
            {
                for (int k = j + 1; k < V[i].size(); k++)
                {
                    if (fr[V[i][j]][V[V[i][j]][k]]) sol += 1;
                }
                fr[i][V[i][j]] = fr[V[i][j]][i] = 0;
            }
        }
    }

    fout << sol << '\n';

    fout.close();
    return 0;
}