Table tennis competition, 37 people, divided into 8 groups, 13 seed players. How to draw lots in groups?

Arrange the match as you said: three groups of four people, five groups of five people, two seeded players in those five groups, and one seeded player in those four groups, which is exactly 13 people. The lottery is very simple, and the seed players line up directly in 8 groups without drawing lots. The remaining 24 people draw lots. Divided into 8 groups: 12345678, 1-3, with 4-8 seeded players in each group. Get the signs ready, three 1, three 2, three 3, three 4, three 5, three 6, three 7, three 8. Then let 24 people draw lots, and the row will be OK.