#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int n,m; cin >> n >> m;
    vector<vector<int>> A(n, vector<int>(n, 0));
    rep(i,m) {
        int a,b; cin >> a >> b; a--; b--;
        A[a][b] = A[b][a] = 1;
    }

    int ans = 0;
    rep(i,n)rep(j,i)rep(k,j) {
        int ok = 1;
        rep(l,n) {
            ok &= !(A[i][l] && A[l][j] && !A[i][j]);
            ok &= !(A[j][l] && A[l][k] && !A[j][k]);
            ok &= !(A[k][l] && A[l][i] && !A[k][i]);
        }
        ans += ok;
    }
    cout << ans << endl;
}