岗
=
冈
+
山
:
Guy Falkes (g) is standing guard (岗) on a small mound (冈; 岗) inside of the anglepod (ang3). He will defend anyone from the policeman's beat (岗) with his fork (山).
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.