#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int n, m;
bool fr[100][100];
bool ok[100][100];


int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  cin >> n >> m;
  REP (i, m) {
    int a, b;
    cin >> a >> b;
    --a, --b;
    fr[a][b] = fr[b][a] = true;
  }

  REP (i, n) REP (j, i) {
    bool ck = false;
    REP (k, n) {
      if (k == i || k == j) continue;
      if (fr[i][k] && fr[k][j])
        ck = true;
    }
    ok[i][j] = ok[j][i] = !ck || fr[i][j];
  }

  int ret = 0;
  REP (i, n) REP (j, i) REP (k, j) {
    if (ok[i][j] && ok[j][k] && ok[k][i])
      ++ret;
  }

  cout << ret << endl;
  
  return 0;
}