#include<stdio.h>
void mergeArrays(int *a1, int n1, int *a2, 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);
        i++;
        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",&arr1[1]);
        }
        scanf("%d",&N2);
        if(N2<=0)
        {
            printf("Invalid input");
            return 0;
        }
        int arr2[N2];
        for(int i=0;i<N2;i++)
        {
            scanf("%d",&arr2[i]);
        }
        int merged[N1*N2];
        mergeArrays(arr1,N1,arr2,N2,merged);
        for(int i=0;i<N1+N2;i++)
        {
            printf("%d",merged[i]);
        }
        return 0;
    }
        }