dudun dudun dudun dudun dudun dudun
dudun
on
dudun dudun dudun dudun dudun dudun .
d u d o n WORD_BOUNDARY d u d o n WORD_BOUNDARY d u d o n WORD_BOUNDARY d u d o n WORD_BOUNDARY d u d o n WORD_BOUNDARY d u d o n WORD_BOUNDARY
d u d u n WORD_BOUNDARY d u d u n WORD_BOUNDARY d u d u n WORD_BOUNDARY d u d u n WORD_BOUNDARY d u d u n WORD_BOUNDARY d u d u n WORD_BOUNDARY . WORD_BOUNDARY