O P Q R S T U
o p q r s t u .
o WORD_BOUNDARY p WORD_BOUNDARY k WORD_BOUNDARY r WORD_BOUNDARY s WORD_BOUNDARY t WORD_BOUNDARY u WORD_BOUNDARY
o WORD_BOUNDARY p WORD_BOUNDARY q WORD_BOUNDARY r WORD_BOUNDARY s WORD_BOUNDARY t WORD_BOUNDARY u WORD_BOUNDARY . WORD_BOUNDARY