a la casa a la casa
a la casa a la casa .
a WORD_BOUNDARY l a WORD_BOUNDARY k a s a WORD_BOUNDARY a WORD_BOUNDARY l a WORD_BOUNDARY k a s a WORD_BOUNDARY
a WORD_BOUNDARY l a WORD_BOUNDARY c a s a WORD_BOUNDARY a WORD_BOUNDARY l a WORD_BOUNDARY c a s a WORD_BOUNDARY . WORD_BOUNDARY