#This program declares a function that accepts a list of strings and returns the number of times letter "a" occurs in an element of the list

# function

def count_of_a(a_list_of_strings):
    new_list = [ ]
    for word in a_list_of_strings:
        if "a" in word:
            new_list.append(word.count("a"))    # This syntax will append to the "new_list" the number of times "a" occurs in a word
        else:
            new_list.append(0)
    print(new_list)


count_of_a(["alligator", "aadvark", "albatross"])
count_of_a([ ])                                                     # Examples( The argument must be a list)