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| |XXX| | | |XXX| | | |XXX|XXX| | |XXX| | + +---+ + + +---+ + + +---+ + + +---+---+ + +---+---+ | |XXX| | | | | | | | | | | | | | | |XXX| | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+ + +---+---+---+ + | | | | | | | |XXX| | | | | |XXX| | | | | | | | | | | + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ | | | | | | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ Step 10 Step 11 Step 12 Step 13 Step 14 +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ |XXX| | | | | | | | | | | | | | | | | | | +---+ +---+ + + +---+ + + +---+ + + +---+ + + +---+ |XXX| | | | | | | | | | | | | | | | | | | +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + | | | | | |XXX| | | | | |XXX| | | | |XXX| | | | |XXX|XXX| | + +---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | |XXX| | | |XXX| | | | |XXX| | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ Step 15 Step 16 Step 17 Step 18 Step 19 +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | | | | |XXX|XXX| |XXX|XXX| | | |XXX| | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | |XXX|XXX| | | | |XXX|XXX| | | | | | | | | | |XXX| | + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ | | | | | | | | | | | | | | | | | | | | +---+ + + +---+ + + +---+ + + +---+ + + +---+ + + | | | | | | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | | | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ Step 20 Step 21 Step 22 Step 23 Step 24 +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | |XXX| | | |XXX| | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+ + +---+---+---+ + +---+---+---+ + | |XXX| | | | |XXX| | | | | | | | | | | | | + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ | | | | | | | | | | |XXX| | |XXX| | | | | | +---+ + + +---+ + + +---+ +---+ +---+---+ + +---+---+ + | | | | | | | | | | |XXX| | |XXX| | |XXX|XXX| | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | | | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ Step 25 Step 26 Step 27 Step 28 Step 29 +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ | | | | | | | | | | | | | | | | | | |XXX| +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+ + +---+---+---+---+ | | 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+---+---+---+---+ | | | | | | | | | | | | |XXX|XXX| | +---+---+ + +---+---+ + +---+---+ + +---+---+ + +---+---+ + | | | | | | | | | | | | | | | | | | | | +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ +---+---+---+---+ Step 35 Step 36 +---+---+---+---+ +---+---+---+---+ | | | | | | | | + +---+---+---+ + +---+---+---+ | | | | | | | | +---+---+---+ + +---+---+---+ + | | | | | | | | +---+---+---+---+ +---+---+---+---+ | |XXX| | | | |XXX| +---+---+ + +---+ +---+ | |XXX| | | | |XXX| +---+---+---+---+ +---+---+---+---+