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package Opt29 is
type Word is mod 2**16;
type PID is record
W1, W2: Word;
end record;
type Root1 is tagged record
Id: PID;
end record;
type Root1_Ptr is access all Root1'Class;
type Root2 is tagged null record;
type Root2_Ptr is access all Root2'class;
type Derived2 is new Root2 with record
Id: PID;
end record;
type Rec is record
F1: Root1_Ptr;
F2: Root2_Ptr;
end record;
procedure Proc (T : Rec);
end Opt29;
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