#include <stdio.h>
#include <stdlib.h>

struct node{
  struct node *right;
  struct node *left;
  struct node *parent;
  int key;
};
typedef struct node * Node;
#define NIL NULL

Node root;

void insert(int);
void inorder(Node);
void preorder(Node);

int main()
{
  int n, i, x;
  char com[20];
  scanf("%d", &n);
  
  for ( i = 0; i < n; i++ )
    {
      scanf("%s", com);
      
      
      if ( com[0] == 'i' ){
	scanf("%d", &x);
	insert(x);
      }
      else if ( com[0] == 'p' )
	{
	  inorder(root);
	  printf("\n");
	  preorder(root);
	  printf("\n");
	}
    
    }

  return 0;
}



void insert(int k)
{
  Node y = NIL;
  Node x = root;
  Node z;
  
  z = malloc(sizeof(struct node));
  z->key = k;
  z->left = NIL;
  z->right = NIL;
  
  while(x!=NIL)
    {
      y = x;
      if(z->key < x->key)
	{
	  x = x->left;
	}
      else
	{
	  x = x->right;
	}
    }
  z->parent = y;
  if(y==NIL)
    {
      root=z;
    }
  else
    {
      if(z->key < y->key)
	{
	  y->left = z;
	}
      else
	{
	  y->right = z;
	}
    }


}

void inorder(Node u){
  if(u == NIL)
    return;
  inorder(u->left);
  printf(" %d",u->key);
  inorder(u->right);

}
void preorder(Node u){
  if(u == NIL)return;
  printf(" %d",u->key);
  preorder(u->left);
  preorder(u->right);
}



