11.SoftUni_Course_Planning_Advanced_Lists

ADD_COMMAND = "Add"
INSERT_COMMAND = "Insert"
REMOVE_COMMAND = "Remove"
SWAP_COMMAND = "Swap"
EXERCISE_COMMAND = "Exercise"
END_COMMAND = "course start"

initial_schedule_of_lessons_and_exercises = input().split(", ")

while True:
    command_input = input().split(":")
    command = command_input[0]
    args = list(map(str, command_input[1:]))

    if command == END_COMMAND:
        for i in range(1, len(initial_schedule_of_lessons_and_exercises) + 1):
            print(f"{i}.{initial_schedule_of_lessons_and_exercises[i - 1]}")
        break

    elif command == ADD_COMMAND:
        if args[0] not in initial_schedule_of_lessons_and_exercises:
            initial_schedule_of_lessons_and_exercises.append(args[0])

    elif command == INSERT_COMMAND:
        lesson, index = args
        if lesson not in initial_schedule_of_lessons_and_exercises:
            initial_schedule_of_lessons_and_exercises.insert(int(index), lesson)

    elif command == REMOVE_COMMAND:
        eventual_exercise = f"{args[0]}-Exercise"
        if args[0] in initial_schedule_of_lessons_and_exercises:
            initial_schedule_of_lessons_and_exercises.remove(args[0])
        if eventual_exercise in initial_schedule_of_lessons_and_exercises:
            initial_schedule_of_lessons_and_exercises.remove(eventual_exercise)

    elif command == SWAP_COMMAND:
        first_title, second_title = args
        if first_title in initial_schedule_of_lessons_and_exercises and second_title in initial_schedule_of_lessons_and_exercises:
            exercise_1_for_swap, one = "", False
            exercise_2_for_swap, two = "", False
            exercise_one, exercise_two = f"{first_title}-Exercise", f"{second_title}-Exercise"
            if exercise_one in initial_schedule_of_lessons_and_exercises:
                initial_schedule_of_lessons_and_exercises.remove(exercise_one)
                exercise_1_for_swap = exercise_one
                one = True
            if exercise_two in initial_schedule_of_lessons_and_exercises:
                initial_schedule_of_lessons_and_exercises.remove(exercise_two)
                exercise_2_for_swap = exercise_two
                two = True
            position_first_title = initial_schedule_of_lessons_and_exercises.index(first_title)
            position_second_title = initial_schedule_of_lessons_and_exercises.index(second_title)
            initial_schedule_of_lessons_and_exercises[position_first_title], initial_schedule_of_lessons_and_exercises[position_second_title] = initial_schedule_of_lessons_and_exercises[position_second_title], initial_schedule_of_lessons_and_exercises[position_first_title]
            if one:
                initial_schedule_of_lessons_and_exercises.insert(position_second_title + 1, exercise_1_for_swap)
            if two:
                initial_schedule_of_lessons_and_exercises.insert(position_first_title + 1, exercise_2_for_swap)

    elif command == EXERCISE_COMMAND:
        lesson_title = args[0]
        exercise = f"{lesson_title}-Exercise"
        if lesson_title in initial_schedule_of_lessons_and_exercises and exercise not in initial_schedule_of_lessons_and_exercises:
            position = initial_schedule_of_lessons_and_exercises.index(lesson_title)
            initial_schedule_of_lessons_and_exercises.insert(int(position + 1), exercise)
        elif lesson_title not in initial_schedule_of_lessons_and_exercises:
            initial_schedule_of_lessons_and_exercises.append(lesson_title)
            initial_schedule_of_lessons_and_exercises.append(exercise)