a io volvió oso
a io volvió oso !
a WORD_BOUNDARY j o̞ WORD_BOUNDARY β o̞ l β j o̞ WORD_BOUNDARY o̞ s o̞ WORD_BOUNDARY
a WORD_BOUNDARY i o WORD_BOUNDARY v o l v i ó WORD_BOUNDARY o s o WORD_BOUNDARY ! WORD_BOUNDARY