esto no es un perrito
esto no es un perrito ?
e s t o WORD_BOUNDARY n o WORD_BOUNDARY e s WORD_BOUNDARY u m WORD_BOUNDARY p e r i t o WORD_BOUNDARY
e s t o WORD_BOUNDARY n o WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY p e r r i t o WORD_BOUNDARY