esto es tuyo no
esto es tuyo no ?
e̞ s t o̞ WORD_BOUNDARY e̞ s WORD_BOUNDARY t u j o̞ WORD_BOUNDARY n o̞ WORD_BOUNDARY
e s t o WORD_BOUNDARY e s WORD_BOUNDARY t u y o WORD_BOUNDARY n o WORD_BOUNDARY ? WORD_BOUNDARY