son zapatos no son zapatillas
son zapatos no son zapatillas .
s o n WORD_BOUNDARY θ a p a t o s WORD_BOUNDARY n o WORD_BOUNDARY s o n WORD_BOUNDARY θ a p a t i ʎ a s WORD_BOUNDARY
s o n WORD_BOUNDARY z a p a t o s WORD_BOUNDARY n o WORD_BOUNDARY s o n WORD_BOUNDARY z a p a t i l l a s WORD_BOUNDARY