tststs tststs tststs
tststs tststs tststs .
t e ɛ s t e ɛ s t e ɛ s WORD_BOUNDARY t e ɛ s t e ɛ s t e ɛ s WORD_BOUNDARY t e ɛ s t e ɛ s t e ɛ s WORD_BOUNDARY
t s t s t s WORD_BOUNDARY t s t s t s WORD_BOUNDARY t s t s t s WORD_BOUNDARY