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

struct node{
  unsigned int key;
  struct node *next;
  struct node *prev;
};

typedef struct node * NodePointer;

NodePointer nil;

NodePointer listSearch(int key){
  NodePointer sol = nil->next;
  while(sol->key != key && sol != nil) sol = sol->next;
  return sol;
}

void init(){
  nil = malloc(sizeof(struct node));
  nil->next = nil;
  nil->prev = nil;
}

void printList(){
  NodePointer cur = nil->next;
  int i,count = 0;
  
  while(cur != nil->prev){
    printf("%d ", cur->key);
    cur = cur->next;
  }
  printf("%d",nil->prev->key);
  //  printf("\n");
}

void deleteNode(NodePointer t){
  t->prev->next = t->next;
  t->next->prev = t->prev;
  free(t);
}

void deleteFirst(){
  NodePointer t = nil->next;
  if ( t == nil ) return;
  nil->next = t->next;
  t->next->prev = nil;
  free(t);
}

void deleteLast(){
  NodePointer t;
  
  t = nil->prev;
  nil->prev = t->prev;
  t->prev->next = nil;
  free(t);
}

void delete(int key){
  NodePointer delete_node;
  
  delete_node = listSearch(key); 

  delete_node->prev->next = delete_node->next;

  delete_node->next->prev = delete_node->prev;

  free(delete_node);

}


void insert(int key){
  NodePointer x;
  x = malloc(sizeof(struct node));
  x->key = key;
  x->next = nil->next;
  x->next->prev = x;
  nil->next = x;
  x->prev = nil;

}

NodePointer listSearch(int key);
void init();
void printList();
void deleteNode(NodePointer t);
void deleteFirst();
void deleteLast();




int main(){
  int key, n, i;
  int size = 0;
  char com[20];
  int np = 0, nd = 0;
  scanf("%d", &n);
  init();
  for ( i = 0; i < n; i++ ){
    scanf("%s%d", com, &key);
    if ( com[0] == 'i' ) {insert(key); np++; size++;}
    else if ( com[0] == 'd' ) {
      if (strlen(com) > 6){
	if ( com[6] == 'F' ) deleteFirst();
	else if ( com[6] == 'L' ) deleteLast();
      } else {
	delete(key); 
	nd++; 
      }
      size--;
    }
  }

  printList();
  return 0;
}