unos zapatos o unas zapatillas
unos zapatos o unas zapatillas .
u n o̞ s WORD_BOUNDARY s a p a t o̞ s WORD_BOUNDARY o̞ WORD_BOUNDARY u n a s WORD_BOUNDARY s a p a t i ʝ a s WORD_BOUNDARY
u n o s WORD_BOUNDARY z a p a t o s WORD_BOUNDARY o WORD_BOUNDARY u n a s WORD_BOUNDARY z a p a t i l l a s WORD_BOUNDARY . WORD_BOUNDARY