un pato y este es un cisne o no
un pato y este es un cisne o no ?
u m WORD_BOUNDARY p a t o WORD_BOUNDARY i WORD_BOUNDARY e s t e WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY θ i s n e WORD_BOUNDARY o WORD_BOUNDARY n o WORD_BOUNDARY
u n WORD_BOUNDARY p a t o WORD_BOUNDARY y WORD_BOUNDARY e s t e WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY c i s n e WORD_BOUNDARY o WORD_BOUNDARY n o WORD_BOUNDARY