cambiamos de libro si
cambiamos de libro si ?
k a m β j a m o̞ s WORD_BOUNDARY d e̞ WORD_BOUNDARY l i β ɾ o̞ WORD_BOUNDARY s i WORD_BOUNDARY
c a m b i a m o s WORD_BOUNDARY d e WORD_BOUNDARY l i b r o WORD_BOUNDARY s i WORD_BOUNDARY ? WORD_BOUNDARY