un perro es un perro
un perro es un perro ?
u n WORD_BOUNDARY p e̞ r o̞ WORD_BOUNDARY e̞ s WORD_BOUNDARY u n WORD_BOUNDARY p e̞ r o̞ WORD_BOUNDARY
u n WORD_BOUNDARY p e r r o WORD_BOUNDARY e s WORD_BOUNDARY u n WORD_BOUNDARY p e r r o WORD_BOUNDARY ? WORD_BOUNDARY