I want to hold a class basketball match in Class 44. I'm mainly divided into 8 groups, ABCDEFGH. The first four groups and five teams, and the last four groups and six teams.

The schedule of the first stage group round robin is as follows:

The first step is to arrange the round robin schedule of each group in order. (The first four groups ***40 games, the last four groups ***60 games, a total of 100 games)

A, B, C and D each have *** 10, and the game order is as follows: 1. 1-2, 3-4, 1-3, 2-5.

Verb (abbreviation of verb) 1-4 six, 3-5 seven, 1-5 eight, 2-4 nine, 2-3 ten, 4-5.

E, F, G and H groups *** 15 games. The order of the game is as follows: 1. 1-2, 3-4, 5-6, 1-3.

Five, 2-5 six, 4-6 seven, 1-4 eight, 2-6 nine, 3-5 ten, 1-5 eleven, 2-4

Twelve. 3-6 XIII, 1-6 XIV, 2-3 XV, 4-5

Step 2: draw lots for each team, and press 1, 2, 3, 4, 5, 6 to determine the team code (there is no sixth team in a group of five teams).

The third step, four games a day (25 days in total)

Groups 2, 4, 7, 9, 12, 14, 17, 19, 22, 24 days, a, b, c, d, each team has one game in the order of the games.

No. 1, 3,5,6,8, 10,1,13, 15, 16,16. In this way, the first stage group round robin can be successfully concluded.

As for the specific venues for four games a day, the school will make arrangements according to the situation.