#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;
 
Node treeMinimum(Node x){
  while(x->left != NIL)
    x = x->left;
   
  return x;
}
 
Node treeMaximum(Node x){
  while(x->right != NIL)
    x = x->right;
   
  return x;
}
 
Node treeSearch(Node x, int k){
  if(x == NIL || k == x->key)
    return x;
  if(k < x->key)
    return treeSearch(x->left,k);
  else
    return treeSearch(x->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 x){
  if(x != NIL){
    inorder(x->left);
    printf(" %d",x->key);
    inorder(x->right);
  }
}
   
void preorder(Node x){
  if(x != NIL){
    printf(" %d",x->key);
    preorder(x->left);
    preorder(x->right);
  }
}
 
 
int main(){
  int n, i, x;
  char com[20];
  scanf("%d", &n);
 
  for ( i = 0; i < n; i++ ){
    scanf("%s", com);
    if ( com[0] == 'f' ){
      scanf("%d", &x);
      Node t = treeSearch(root, x);
      if ( t != NIL ) printf("yes\n");
      else printf("no\n");
    } else if ( com[0] == 'i' ){
      scanf("%d", &x);
      insert(x);
    } else if ( com[0] == 'p' ){
      inorder(root);
      printf("\n");
      preorder(root);
      printf("\n");
    } else if ( com[0] == 'd' ){
      scanf("%d", &x);
      treeDelete(treeSearch(root, x));
    }
  }
 
  return 0;
}

