a papás y a mamás
a papás y a mamás .
a WORD_BOUNDARY p a p a s WORD_BOUNDARY i WORD_BOUNDARY a WORD_BOUNDARY m a m a s WORD_BOUNDARY
a WORD_BOUNDARY p a p á s WORD_BOUNDARY y WORD_BOUNDARY a WORD_BOUNDARY m a m á s WORD_BOUNDARY . WORD_BOUNDARY