SHOW not working in shopping list app 3

<p>
shopping_list=[]


def show_help():
    print("\nSeperate each item with a comma.")
    print ("Type DONE to quit. SHOW to see the 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 a list of things you want to shop for.")
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 
    new_list=new_stuff.split(",")
    index=input("Add this at a certain spot? press enter for the end of the list, "
                "or give me a number.Currently {} items in the list".format(
                len(shopping_list)))
    if index:
        spot=int(index)-1
        for item in new_list:
            shopping_list.inster(spot,item.strip())
            spot+=1
        else:
            for item in new_list:
                shopping_list.append(item.strip())

<\p>
,,,