fffffffff   uuuuuu     uuuuu   ccccccccccccc  kkkkk   uuuuuuuuu
fffffffff   uuuuuu     uuuuu   ccccccccccccc
fffff       uuuuuu     uuuuu   cccc
fffffffff   uuuuuu     uuuuu   cccc
fffffffff   uuuuuu     uuuuu   cccc
fffff       uuuuuu     uuuuu   cccc
fffff       uuuuuuuuuuuuuuuu   cccccccccccc
fffff       uuuuuuuuuuuuuuuu   cccccccccccc