BD3_K1_Z4_g1

--4
declare @i int = 10000
declare @sum int = 0

while @i < 100000
begin
    declare @number varchar(5) = cast(@i as varchar)
    declare @tempSum int = 0
    declare @j int =1

    while (@j <= 5)
    begin
        set @tempSum = @tempSum + SUBSTRING(@number, @j, 1)
        set @j=@j+1
    end

    if @tempSum = 12
        set @sum = @sum + @i

    set @i = @i + 1
end

select @sum