#include <cstdio>
#include <set>

using namespace std;

static int queries[1024 * 1024];

int main()
{
	for (int N, M; scanf("%d%d", &N, &M) != EOF && N && M;){
		for (int i = 0; i < N; ++i){
			scanf("%d", &queries[i]);
		}

		set<int> memo;
		for (int i = N - 1; i >= 0 && memo.size() < M; --i){
			const int query = queries[i];
			if (!memo.count(query)){
				memo.insert(query);

				printf("%d\n", query);
			}
		}
	}
}