A20:=MA(C,20);
AA:=A5 A10 AND A10 A20 AND A5 REF(A5,1) AND A10 REF(A10,1) AND A20 REF(A20,1);
BB:=crOSS(A2,A5);
COUNT(BB,AA)=1;

A20:=MA(C,20);
AA:=A5 A10 AND A10 A20 AND A5 REF(A5,1) AND A10 REF(A10,1) AND A20 REF(A20,1);
BB:=crOSS(A2,A5);
COUNT(BB,AA)=1;

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