哨
=
口
+
肖
:
The little prince (肖) took a part time job working as a sentry (哨) for Sherlock Holmes (sh). In the aortas's bathroom (ao4) he whistles (哨), thereby giving the secret signal to Sherlock. Sherlock answers by holding up a mandarin (口), which is the secret signal of acknowledgement.
绍
=
召
+
纟
:
When Sherlock Holmes (sh) was in the middle of taking a shower in the aorta's bathroom (ao4), the water suddenly stopped an he was unable to continue (绍). Now he wants to call the janitor over the intercom (召), but the connection is very slow. It is because inside of the intercom sits a very small silk worm (纟) which listens to Sherlock Holmes and then carries on (绍) the message to the next relay point.