#include <set>
#include <cstdio>

using namespace std;

int main() {
	multiset<int> s = {1, 2, 3};
	s.insert(s.begin(), s.end());
	//{1, (1), 2, 3}
	//{1, (1), 1, 2, 3}
	//{1, 1, (1), 2, 3}
	for (int x : s) printf("%d " ,x);
}