a donde van os trens
a donde van os trens ?
a WORD_BOUNDARY ð o n d e WORD_BOUNDARY β a n WORD_BOUNDARY o s WORD_BOUNDARY t ɾ e n s WORD_BOUNDARY
a WORD_BOUNDARY d o n d e WORD_BOUNDARY v a n WORD_BOUNDARY o s WORD_BOUNDARY t r e n s WORD_BOUNDARY