----------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ ---------------------------------------------------3-3-3-3-3-3-3-3-------------------------------- ------------------4-4-4-4-4-4-4-4----------------------------------------------------------------- -----------------------------------2-2-2-2-2-2-2-2------------------------------------------------ ---1-1-1-1-1-1-1-1-------------------------------------------------4-4-4-4-4-4-4-4----------------------- --22-22-22------------------------------------------------------------------------------------- -----------20-20b----13b------------------------------------------------------------------------------------------------------------------------------------------------------------------ ------------------7b---------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -----------------------------------------------------------------------------------------