inventory

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

while True:
    command = input().split(" - ")
    if "Craft!" in command:
        break
    item = command[1]
    if "Collect" in command and item not in input_items:
        input_items.append(item)
    elif "Drop" in command and item in input_items:
        input_items.remove(item)
    elif "Combine Items" in command:
        item_split = item.split(":")
        if item_split[0] in input_items:
            index_old = input_items.index(item_split[0])
            input_items.insert(index_old + 1, item_split[1])
    elif "Renew" in command and item in input_items:
        input_items.remove(item)
        input_items.append(item)
print(", ".join([s for s in input_items]))