fuíste al tren con mamá
fuíste al tren con mamá ?
f w i s t e̞ WORD_BOUNDARY a l WORD_BOUNDARY t ɾ e̞ n WORD_BOUNDARY k o̞ n WORD_BOUNDARY m a m a WORD_BOUNDARY
f u í s t e WORD_BOUNDARY a l WORD_BOUNDARY t r e n WORD_BOUNDARY c o n WORD_BOUNDARY m a m á WORD_BOUNDARY ? WORD_BOUNDARY