#include <bits/stdc++.h>
using namespace  std;
int a[10086],b[10086],n1,n2;
int  main( )     
{   
    cin>>n1>>n2;
    for (int i=1;i<=n1;i++)
    {
        cin>>a[i];
        for (int j=1;j<=i;j++)
        {
            if (a[i]==a[j])
                a[i]=0,i--;
        } 
    }
    for (int i=1;i<=n2;i++)
    {
        cin>>b[i];
        for (int j=1;j<=i;j++)
        {
            if (b[i]==b[j])
                b[i]=0,i--;
        } 
    }
    for (int i=1;i<=n1;i++)
        cout<<a[i]<<' ';
    cout<<endl;
    for (int i=1;i<=n2;i++)
        cout<<b[i]<<" ";
    return 0;
}