si a las cafa las cafas
si a las cafa las cafas .
s i WORD_BOUNDARY a WORD_BOUNDARY l a s WORD_BOUNDARY k a f a WORD_BOUNDARY l a s WORD_BOUNDARY k a f a s WORD_BOUNDARY
s i WORD_BOUNDARY a WORD_BOUNDARY l a s WORD_BOUNDARY c a f a WORD_BOUNDARY l a s WORD_BOUNDARY c a f a s WORD_BOUNDARY . WORD_BOUNDARY