#include<stdio.h>
void mergeArrays(int *a1,int n1,int n2,int*merged)
{
    int i=0,j=0;k=0;
    while(i< n1 && j < n2)
    {
        if(*(a1+i) <= *(a2 + j))
        {
            *(merged +k)= *(a1 + i);
            i++;
        }
        else 
        {
            *(merged +k)= *(a2 + j);
            j++;
        }
        k++;
    }
    while(i<n1)
    {
        *(merged +k) = *(a1 + i);
        i++;
        k++;
    }
    while(j<n2)
    {
        *(merged +k) = *(a2 + j);
        j++;
        k++;
    }
}
int main()
{
    int N1,N2;
    scanf("%d",&N1);
    if(N1<=0)
    {
        printf("Invalid input");
        return 0;
    }
    int arr1[N1];
    for(int i=0;i<N1;i++)
    {
        scanf("%d",&N2);
    }
        if(N2<=0)
        {
            printf("Invalid input");
            return 0;
        }
        int arr2[N2];
        for(int i =0;i<N1+N2;i++)
        {
            scanf("%d",&arr2[i]);
        }
        int merged[N1+N2]
        mergedArrays(arr1,N1,arr2,N2,merged);
        for(int i=0;i<N1+N2;i++)
        {
            printf("%d",merged[i]);
        }
        return 0;
    
}