I didn’t do it on purpose but I chose pretty much the same themes as the course 
Police Station (easy):
-cuffs
-badge
-report
-cell
-donut
Library (medium):
-shakespear
-twilight
-silence
-innsmouth
-shining
Planetarium (hard):
-astronauts
-constellation
-elliptical
-galileogalilei
-astronomer
