#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);
Node treeMaximum(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[7];
  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;
}

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 x;
  if(z->left == NIL || z->right ==NIL){
    y = z;
  }
  else{
    y=treeSuccessor(z);
  }
  if(y->left != NIL){
    x = y->left;
  }
  if(x != NIL){
    x->parent = y->parent;
  }
  if(y->parent == NIL){
    x = root;
  }
  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);
  }
}

