f f f f f s r m f f f f f s r
m m f s m r r m d
r r f f m r m s s f m f f r s m
f f f f f s r m f f f f f s r
m m f s m r r m d
r r f f m r m s s f s l' d d' s m
m s l m s l m s f m r r m
f f f m d r r d t d
m s l m s l m s f m r r m
f f f m s l s s l l