import java.util.Scanner;
import java.util.Collections;
import java.util.ArrayList;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
ArrayList<Integer> result = new ArrayList<>();
// 读取 n 和 m
int n = sc.nextInt();
int m = sc.nextInt();
// 读取第一个序列
int[] arr1 = new int[n];
for (int i = 0; i < n; i++) {
arr1[i] = sc.nextInt();
result.add(arr1[i]);
}
// 读取第二个序列
int[] arr2 = new int[m];
for (int i = 0; i < m; i++) {
arr2[i] = sc.nextInt();
result.add(arr2[i]);
}
Collections.sort(result);
for (int i = 0; i < result.size(); i++) {
System.out.print(result.get(i) + " ");
}
}
}