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