Asyncio: order loop

Python Help
,
1

Hello,

I would like to know how can I order a program like this:

import asyncio


async def multi_coro():
    async with asyncio.TaskGroup() as tg:
        tg.create_task(coro('5'))
        print('3-')
        tg.create_task(coro('6'))
        print('4-')


async def coro(i):
    print(i)
    await asyncio.sleep(.1)
    print(i)


async def main():
    async with asyncio.TaskGroup() as tg:
        tg.create_task(multi_coro())
        print('1-')
        tg.create_task(coro('7'))
        print('2-')
    print('8-')


asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
asyncio.run(main())

My goal is to get this return:

1-
2-
3-
4-
5
6
7
5
6
7
8-

But the return is:

1-
2-
3-
4-
7
5
6
7
5
6
8-

In use asyncio.gather(), the result is like TaskGroup.

async def gather():
    print('3-')
    await asyncio.gather(*[coro('4'), coro('5')])
    print('6-')

So I would like to know how can I do to call tasks group in multi_coro before to call the second task in the main()

Tanks you.