import sys
import math
import random
import os

names = list(input("Type names: ").split(", "))

while True:
    command = input()
    if command == "END": break

    if command == "Add visitor":
        names.append(input())
    elif command == "Add visitor on position":
        name_to_insert = input()
        names.insert(int(input()), name_to_insert)
    elif command == "Remove visitor on position":
        names.pop(int(input()))
    elif command == "Remove last visitor":
        names.pop(len(names) - 1)
    elif command == "Remove first visitor":
        names.pop(0)
    else: print("ERROR, indxistant command")

print(names)