eso es un tren
eso es un tren ?
e̞ s o̞ WORD_BOUNDARY e̞ s WORD_BOUNDARY u n WORD_BOUNDARY t ɾ e̞ n WORD_BOUNDARY
e s o WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY t r e n WORD_BOUNDARY ? WORD_BOUNDARY