import asyncio


async def f1():
    for _ in range(10):
        yield 1
        await asyncio.sleep(0.2)


async def f2():
    for _ in range(10):
        yield 2
        await asyncio.sleep(0.2)


async def main():
    async for i in f1():
        print(i, end='', flush=True)
    async for i in f2():
        print(i, end='', flush=True)


asyncio.run(main())