#include <iostream>
#include <vector>
#include <set>
#include <tuple>
#include <algorithm>
using namespace std;

int m[55][55];

bool check(int i, int j, int k, int l) {
  return  m[i][j] &&
          m[j][k] &&
          m[k][l] &&
          m[l][i] &&
          !m[i][k] &&
          !m[j][l];
}

int main() {
  int n, M; cin >> n >> M;
  for (int i = 0; i < M; i++) {
    int a, b; cin >> a >> b;
    m[a][b] = m[b][a] = 1;
  }
  int c = 0;
  for (int i=0; i<n; i++)
    for (int j=0; j<i; j++)
      for (int k=0; k<j; k++)
        for (int l=0; l<k; l++)
          if (check(i, j, k, l) || check(i, k, j, l) || check(i, j, l, k))
            c++;
  cout << c << "\n";
}