x x x o o o
x x x o o o
n:let n:let n:let n:let n:let n:let
x x x o o o .
ɛ k s WORD_BOUNDARY ɛ k s WORD_BOUNDARY ɛ k s WORD_BOUNDARY oʊ WORD_BOUNDARY oʊ WORD_BOUNDARY oʊ WORD_BOUNDARY
x WORD_BOUNDARY x WORD_BOUNDARY x WORD_BOUNDARY o WORD_BOUNDARY o WORD_BOUNDARY o WORD_BOUNDARY