1 #include <iostream>
 2 #include <cstdio>
 3 #include <algorithm>
 4 
 5 using namespace std;
 6 
 7 int num[10010+10000];
 8 
 9 int main ()
10 {
11     int n,m;
12     while (~scanf("%d%d",&n,&m))
13     {
14         for (int i=0; i<n+m; i++)
15         {
16             scanf("%d",&num[i]);
17         }
18         sort(num,num+n+m);
19         for (int i=0; i<n+m; i++)
20         {
21             if (i==0)
22             {
23                 printf ("%d",num[0]);
24                 continue;
25             }
26             if (num[i]==num[i-1])
27                 continue;
28             else
29                 printf (" %d",num[i]);
30         }
31         printf ("\n");
32     }
33     return 0;
34 }