#include <bits/stdc++.h>
using namespace std;

void test() {
    vector<int> v;
    for (int i = 1; i <= 10; i+=2) {
        v.push_back(i);
    }

    for (int i = 1; i != 10; i = v[i]) {
        cout << i << " ";
    }

}

int main() {
    test();

    return 0;
}