// editor5// editor3// editor1
// editor4
#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>

typedef struct node{
    int data;
    struct node *left,*right;
}Node;

Node *root=NULL;
int size;
Node *create(int num){
    Node *newNode =(Node*)malloc(1* sizeof(Node));
    newNode->data=num;
    newNode->left=NULL;
    newNode->right=NULL;
    return newNode;
}
Node *insert(Node *root,int num){
    if(root == NULL){
        return create(num);
    }else if(num < root->data){
        root->left=insert(root->left,num);
    }else if(num > root->data){
        root->right=insert(root->right,num);
    }return root;
}

void sortNode(Node *root){
    if(root != NULL){
        printf("%d ",root->data);
        leftNode(root->left);
        leftNode(root->right);
        
        
    }
}
int main(){
    int num,i,val;
    scanf("%d",&size);
    if(size<=0){
        printf("Invalid input");
        return 0;
    }
    for(i=1;i<=size*2;i++){
        scanf("%c",&num);
        if(num == ' ')
            continue;
        else
            root=insert(root,num);
    }
    scanf("%d",&val);
    root=insert(root,val);
    sortNode(root);
    return 0;
}