A1:=C>=REF(C,4);
A:=C[AA:=C][T:=BArslAst(AA);]
N:=T=1 AND REF(T=0 AND AA,1) AND A;
N1:=T=2 AND REF(N,1) AND A;
N2:=T=3 AND REF(N1,1) AND A;
N3:=T=4 AND REF(N2,1) AND A;
N4:=T=5 AND REF(N3,1) AND A;
N5:=T=6 AND REF(N4,1) AND A;
N6:=T=7 AND REF(N5,1) AND A;
N7:=T=8 AND REF(N6,1) AND A;
XG:N7;