#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define endl '\n'
#define fi first
#define se second
#define For(i, l, r) for (int i = l; i < r; i++)
#define ForE(i, l, r) for (int i = l; i <= r; i++)
#define FordE(i, l, r) for (int i = l; i >= r; i--)
#define Fora(v, a) for (auto v: a)
#define bend(a) a.begin(), a.end()
#define isz(a) ((signed)a.size())
typedef long long ll;
typedef long double ld;
typedef pair <int, int> pii;
typedef vector <int> vi;
typedef vector <pii> vpii;
typedef vector <vi> vvi;
const int N = 3e3 + 5;
int n, m;
bool adj[N][N];
bool ck[N];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
// freopen(".inp", "r", stdin);
// freopen(".out", "w", stdout);
cin >> n >> m;
ForE(i, 1, m){
int u, v; cin >> u >> v;
adj[u][v] = 1;
}
ForE(i, 1, n){
ForE(j, i + 1, n){
if (!adj[i][j] && !ck[i] && !ck[j]){
ck[i] = ck[j] = 1;
}
}
}
vi vans;
ForE(i, 1, n){
if (!ck[i]){
vans.push_back(i);
if (isz(vans) == n / 3){
break;
}
}
}
Fora(&v, vans){
cout << v << ' ';
} cout << endl;
}
/*
==================================================+
INPUT: |
--------------------------------------------------|
--------------------------------------------------|
==================================================+
OUTPUT: |
--------------------------------------------------|
--------------------------------------------------|
==================================================+
*/
