obrve obrve obrve obrve
obrve obrve obrve obrve .
o b r v ɛ WORD_BOUNDARY o b r v ɛ WORD_BOUNDARY o b r v ɛ WORD_BOUNDARY o b r v ɛ WORD_BOUNDARY
o b r v e WORD_BOUNDARY o b r v e WORD_BOUNDARY o b r v e WORD_BOUNDARY o b r v e WORD_BOUNDARY