Shopping List App Not Working

>>> Give me list items.

Separate each item with a comma.
Type DONE to quite, SHOW to see current list, and HELP to get this message.
> bla, foo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/david/Dropbox (Personal)/Learning/TreeHouse/Python/Collections/shopping_list_3.py", line 17, in <module>
    new_stuff = input("> ")
  File "<string>", line 1, in <module>
NameError: name 'bla' is not defined

shopping_list = []

def show_help():
    print("\nSeparate each item with a comma.")
    print("Type DONE to quite, SHOW to see current list, and HELP to get this message.")

def show_list():
    count = 1
    for item in shopping_list:
        print("{}: {}".format(count, item))
        count += 1

print("Give me list items.")
show_help()

while True:
    new_stuff = input("> ")

    if new_stuff == "DONE":
        print("\nHere's your list:")
        show_list()
        break
    elif new_stuff == "HELP":
        show_help()
        continue 
    elif new_stuff == "SHOW":
        show_list()
        continue 
    else:
        new_list = new_stuff.split(",")
        index = input("add this at a spot? press enter for end of list,"
                        "or give me a number. Currently {} items in list.".format(len(shopping_list)))
        if index:
            spot = int(index) - 1
            for item in new_list:
                shopping_list.insert(spot, item.strip())
                spot += 1
        else:
            for item in new_list:
                shopping_list.append(item.strip())