program _lucky_numbs var longint fo text Function DigSum integer byte

program _lucky_numbs;
 
var
 i          : longint;
 fo         : text;
 
Function DigSum(N : integer):byte;
{возвращает сумму цифр N }
var
 sum        : byte;
begin
 sum:=0;
 while N>0 do 
     begin
      inc(sum,N mod 10);
      N:=N div 10;
     end;
DigSum:=sum;
end;
 
BEGIN
assign(fo,'output.txt');rewrite(fo);
Writeln(fo,'Lucky numbs: ');
for i:=1000 to 9999 do 
   if digSum(i mod 100)=DigSum(i div 100) then Writeln(fo,i);
close(fo);
 
END.