And finally I learned the formula is, four GREen houses, red hotel, four GREen houses, red hotel.

最后我发现，公式就是：四座绿房子——一座红旅馆——四座绿房子——一座红旅馆。

youdao

And finally I learned the formula is, four GREen houses, red hotel, four GREen houses, red hotel.

最后我发现，公式就是：四座绿房子——一座红旅馆——四座绿房子——一座红旅馆。

youdao