ESCALATOR

Before
1: S
glass, down, up
2: SU
moving, living
After
1: S
clause, down, up
2: SU
clauses
Surrounder Phrases
steps leading, descending, down, upmucociliary systemlong ciliary, ride, descendingleading up, downdescending steps, downglass works, downride down, upduty clausefirst steps, clause, dutygoing down, upsystem worksmoving down, upanother glassprice system