Higher Order Functions is a room. To decide which number is (N - number) added to (M - number) (this is addition): decide on N + M. To decide which number is multiply (N - number) by (M - number) (this is multiplication): decide on N * M. To demonstrate (P - phrase (number, number) -> number) as (title - text): say "[title]: [P applied to 12 and 34]." When play begins: demonstrate addition as "Add"; demonstrate multiplication as "Mul"; end the story.