#ot, #offtopic: Tells the user to move to @TelethonOffTopic.

async def handler(event):
    """#ot, #offtopic: Tells the user to move to @TelethonOffTopic."""
    await asyncio.wait([
        event.delete(),
        event.respond(OFFTOPIC[event.chat_id], reply_to=event.reply_to_msg_id)
    ])