#include <stdio.h>
#include <stdlib.h>
#define NIL NULL
#define MAX 500001
struct node{
  struct node *right;
  struct node *left;
  struct node *parent;
  int key;
};
typedef struct node * Node;

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){
while ( x!=NIL && k!=x->key){
  if(k<x->key) x=x->left;
  else x=x->right;
}
return x;
}

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);
  preorder(u->left);
  preorder(u->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;
}

