#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define sp <<" "<<
#define endl "\n"
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
vector<vector<pair<int, int>>> adj(N), rev(N);
int a, b, c, d, e, f;
for (int i = 0; i < M; i++) {
adj[U[i]].emplace_back(V[i], i);
rev[V[i]].emplace_back(U[i], i);
if (U[i] == 0 and V[i] == 1) a = i;
if (U[i] == 1 and V[i] == 0) b = i;
if (U[i] == 1 and V[i] == 2) c = i;
if (U[i] == 2 and V[i] == 1) d = i;
if (U[i] == 0 and V[i] == 2) e = i;
if (U[i] == 2 and V[i] == 0) f = i;
}
vector<int> ans;
if (N > 2) {
ans = {a, c, e, f, d, b, e, c, a, b, d, f};
} else {
return false;
}
return ans;
}
