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LOOPMULU
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N A,B,C,D,%
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S A(1)="a",A(2)="b",A(3)="c",A(4)="d"
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S B(1)="A",B(2)="B",B(3)="C",B(4)="D"
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S C(1)="1",C(2)="2",C(3)="3"
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; will error S %=$O(A("")) F Q:%="" W !,A(%),B(%),C(%) S
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%=$O(A(%))
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S %=$O(A("")) F Q:%="" W !,$G(A(%)),$G(B(%)),$G(C(%)) S %=$O(A(%))
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K A,B,C,D,%
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