dos unos es un once
dos unos es un once .
d o̞ s WORD_BOUNDARY u n o̞ s WORD_BOUNDARY e̞ s WORD_BOUNDARY u n WORD_BOUNDARY o̞ n s e̞ WORD_BOUNDARY
d o s WORD_BOUNDARY u n o s WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY o n c e WORD_BOUNDARY . WORD_BOUNDARY