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var
   L,i:integer;
   Ustr,str:string;
   p:char;
begin
  str:='123456789ABCDEFG'
  L:=length(str);
  for i:=1 to l do begin
      p:=str[i];
      str[i]:=str[l-(i-1)];
      str[l-(i-1)]:=p;
      if i=(l div 2) then break;
 end;
 


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procedure DoubleTheValue (var Value: Integer);
begin
Value := Value * 2;
end;
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var
X: Integer;
begin
X := 10;
DoubleTheValue (X);
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VK-CANCEL 03 3 Contol-break Ö´ÐÐ
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VK_TAB 09 9 Tab¼ü
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