哎 = 口 + 艾 : Albert Einstein (Ø) wants to warn the public about the dangers of aids (艾). In front of the airplane (ai1) he dresses as a mandarin (口) and shouts "hey!" (哎) at the people to get their attention.

呀 = 口 + 牙 : Maud Younger (y) has an aching wisdom tooth. She attached a string to it and stands on top of the ashram (a5). At the other end of the string she attached a mandarin (口). When she throws the mandarin down the lighthouse, the string will pull out her aching wisdom tooth. It will hurt a little, so Maud is sure to say "哎呀" when the tooth is pulled.