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

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

    for (int i = 9; i != 5; i = v[i]) {
        cout << v[i] << " " <<  i << " "; // 10 9 0 10 1 0 2 1 3 2 4 3 5 4
        cout.flush();
    }

}

int main() {
    test();

    return 0;
}