Draw lots to decide Group A, five teams and the other four teams.
Prepare four small pieces of paper and write two A's and two B's respectively.
BCD three groups can draw lots directly to decide the top two in the knockout round.
Add another piece of paper "C" to the above four pieces of paper and draw lots for A, B and B..
Among them, the winner of Party A and Party B appears the loser of Party A, and then the two teams compete for the winner and decide the last qualifying quota.
In this way, nine teams will qualify and then compete for the points ranking. If there is division, they can compete one by one.
This makes it easier to choose 1-8.
Thank you, hope to adopt.