03. Contacts list

contacts = input().split()

while True:
    command = input().split()
    action = command[0]

    if action == "Add":
        contact = command[1]
        index = int(command[2])
        if contact not in contacts:
            contacts.append(contact)
        else:
            if 0 <= index < len(contacts):
                contacts.insert(index, contact)

    elif action == "Remove":
        index = int(command[1])
        if 0 <= index < len(contacts):
            contacts.pop(index)

    elif action == "Export":
        start_index = int(command[1])
        count = int(command[2])

        # If the count requested is more than the contacts- just print them to the end.
        if count > len(contacts):
            count = len(contacts)

        # Print the next {count} contacts starting from the given {startIndex} (including), separated by a single space.
        if 0 <= start_index < count:
            for contact in range(start_index, count):
                print(contacts[contact], end=" ")
        print()

    elif action == "Print":
        status = command[1]
        print("Contacts: ", end="")
        if status == "Normal":
            print(" ".join(contacts))
        elif status == "Reversed":
            contacts.reverse()
            print(" ".join(contacts))
        break