............................................
..cccccccc..AAAAAAAA....VV....VV..AAAAAAAA..
..CCC.......AAA..AAA.....VV..VV...AAA..AAA..
..CCC.......AAAAAAAA......VVVV....AAAAAAAA..
..cccccccc..AAA..AAA.......VV.....AAA..AAA..
............................................
?? ??????????????????????????????????????????