es una es un oso
es una es un oso ?
e̞ s WORD_BOUNDARY u n a WORD_BOUNDARY e̞ s WORD_BOUNDARY u n WORD_BOUNDARY o̞ s o̞ WORD_BOUNDARY
e s WORD_BOUNDARY u n a WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY o s o WORD_BOUNDARY ? WORD_BOUNDARY