spam=['apples','bananas','tofu','cats']
def fruits():
    i=0
    while (i<len(spam)):
           if(i!=(len(spam)-1)):
           print(spam[i],end=', ')
           else:
           print("and",spam[i])
           i=i+1
fruits()

spam=['apples','bananas','tofu','cats']
def fruits():
    i=0
    while (i<len(spam)):
           if(i!=(len(spam)-1)):
              print(spam[i],end=', ')
           else:
                print("and",spam[i])
           i=i+1
fruits()