abre la boca a_ver
abre la boca a ver ?
a β ɾ e̞ WORD_BOUNDARY l a WORD_BOUNDARY β o̞ k a WORD_BOUNDARY a WORD_BOUNDARY β e̞ ɾ WORD_BOUNDARY
a b r e WORD_BOUNDARY l a WORD_BOUNDARY b o c a WORD_BOUNDARY a WORD_BOUNDARY v e r WORD_BOUNDARY ? WORD_BOUNDARY