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[.......................................................................] [.................................4.....................................] [.......................................................................] [.................................4.....................................] [.......................................................................] [4.4.4.4.4.4.4.4.4................4.....................................] [..................4.4.4.4.4.4.4........................................] [................................4...4..................................] [..............................................4........................] [...................................X............................4......] [.......................................................................] [.......................................................................] [.......................................................................] [.......................................................................] [................4......................................................] [..............................4........................................] [...................................4........4..........................] [..............................................4.4.4.4.4.4.4.4.4........] [...........................................4....................4.4.4.4] [.......................................................................] [...........................................4...........................] [.......................................................................] [...........................................4...........................] [.......................................................................] [...........................................4...........................] [.......................................................................] 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