var i : integer;
begin
   for i := 1 to 10 do
{ 1}   begin
    begin
    begin
    begin
{ 5}    begin
    begin
    begin
    begin
    begin
{10}    begin
    begin
    begin
    begin
    begin
{15}    begin
    begin
    begin
    begin
    begin
{20}    begin
    begin
    begin
    begin
    begin
{25}    begin
    begin
    begin
    begin
    begin
{30}    begin
    begin
    begin
    begin
    begin
{35}    begin
    begin
    begin
    begin
    begin
{40}    begin
    begin
    begin
    begin
    begin
{45}    begin
    begin
    begin
{48}    begin
        { ... }
        end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
    end;
   end;
end.