duf duf duf duf duf duf duf
duf duf duf duf duf duf duf .
d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY
d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY d u f WORD_BOUNDARY