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[ A ] { offset: 4,0; origin: U; }
[ B|I ] { offset: 32,0; origin: A; }
[ C | D||E ] { offset: 0,1; origin: A; }

[ U ] --> [ A ]
[ U ] --> { start: north; } [ I ]
[ A ] --> [ BI.1 ]
[ A ] --> [ BI.0 ]
[ I ] --> [ Z ]
[ BI.1 ] --> [ I ]