#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)=*(a2+j);
            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];
    int i=0;
    for (i=0; i<N1; i++)
    {
        printf("Invalid input");
        return 0;
    }
    int arr2[N2];
    for (int i=0; i<N1+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;
}