Define at least four functions:

• judge_cards that consumes a list of strings representing cards and produces a list of integers, by converting the string "club" to 2 and "spade" to 3.
• summate that consumes a list of integers and adds them all together to produce an integer.
• no_red_cards that consumes a list of strings and produces a list of strings, without any occurrences of the values "heart" or "diamond".
• add_black_cards that consumes a list of strings and produces the sum total of all the black cards’ judged values.

One of the functions should compose all the other functions.