Ok, I see, Just I have to replace all uppercased babels and example blocks to lowercase to keep same.
I have a lot of org files. Huge for me.
I can take with the lower-case tag.

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On Sat, Nov 18, 2017 at 3:14 AM, Eric Abrahamsen <eric@ericabrahamsen.net> wrote:
"numbchild@gmail.com" <numbchild@gmail.com> writes:

> Yeah, I misunderstand your code. Anyway, It should be like this:
>
> #+BEGIN_SRC python
> ...
> #+END_SRC
>
> #+BEGIN_EXAMPLE
> ...
> #+END_EXAMPLE
>
> etc

If you look back up this (admittedly very long) thread, you'll see the
general consensus is to move to lower-case tags. I've intentionally left
things lowercase, and now will have to handle "example" specially, based
on the value of `org-babel-uppercase-example-markers'.