#include <iostream>
#include <fstream>

using namespace std;

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

const int NMax = 4100;

bool v[NMax][NMax];

int main()
{
    int n, m, x, y, ans;
    fin >> n >> m;
    for(int i = 1; i <= m; i++){
        fin >> x >> y;
        v[x][y] = 1;
        v[y][x] = 1;
    }
    ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            if(v[i][j]){
                for(int k = j + 1; k <= n; k++){
                    if(v[i][k] && v[k][j]){
                        v[j][i] = 0;
                        v[k][i] = 0;
                        ans++;
                    }
                }
            }
        }
    }
    fout << ans;
    return 0;
}