du-du-du+du+du+du+du
du-du-du du du du du .
d yː d yː d yː WORD_BOUNDARY d yː WORD_BOUNDARY d yː WORD_BOUNDARY d yː WORD_BOUNDARY d yː WORD_BOUNDARY
d u - d u - d u WORD_BOUNDARY d u WORD_BOUNDARY d u WORD_BOUNDARY d u WORD_BOUNDARY d u WORD_BOUNDARY