una luna si o no
una luna si o no ?
u n a WORD_BOUNDARY l u n a WORD_BOUNDARY s i WORD_BOUNDARY o̞ WORD_BOUNDARY n o̞ WORD_BOUNDARY
u n a WORD_BOUNDARY l u n a WORD_BOUNDARY s i WORD_BOUNDARY o WORD_BOUNDARY n o WORD_BOUNDARY ? WORD_BOUNDARY