K  K   GGG   K  K  H  H  U   U 
 K K   G      K K   H  H  U   U 
 KK    G  GG  KK    HHHH  U   U 
 K K   G   G  K K   H  H  U   U 
 K  K   GGG   K  K  H  H   UUU