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

#define NIL NULL

struct node{
  struct node *right;
  struct node *left;
  struct node *parent;
  int key;
};
typedef struct node * Node;

Node root;

Node treeMinimum(Node);
Node treeSearch(Node, int);
Node treeSuccessor(Node);
void treeDelete(Node);
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{
      inorder(root);
      printf("\n");
      preorder(root);
      printf("\n");
    }
  }

  return 0;
}

Node treeMinimum(Node x){
  while(x->left != NIL){
    x = x->left;
  }
  return x;
}

Node treeSearch(Node u, int k){
  if(u == NIL || k == u->key)return u;

  if(k < u->key)return treeSearch(u->left, k);
  else return treeSearch(u->right, k);
}

Node treeSuccessor(Node x){
  Node y;
  if(x->right != NIL){
    return treeMinimum(x->right);
  }
  y = x->parent;
  while(y != NIL && x == y->right){
    x = y;
    y = y->parent;
  }
  return y;
}

void treeDelete(Node z){
  Node y; // node to be deleted
  Node x; // child of y

  if(z->left == NIL || z->right == NIL)y = z;
  else y = treeSuccessor(z);

  if(y->left != NIL)x = y->left;
  else x = y->right;

  if(x != NIL)x->parent = y->parent;

  if(y->parent == NIL)root = x;
  else if(y == y->parent->left)y->parent->left = x;
  else y->parent->right = x;

  if(y != z){
    z->key =y->key;

  }
}

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);
  inorder(u->left);
  inorder(u->right);
  
}