#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(j<n2)
{
    *(merged+k)=*(a2+j);
    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 arr2[N2];
for(int i=0;i<N2;i++)
{
    scanf("%d",&arr1[i]);
}

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;
}