Divide the 4th digit of the lottery numbers (4-57) into 9 parts:
No.1 range: 4 - 9
No.2 range: 10 - 15
No.3 range: 16 - 21
No.4 range: 22 - 27
No.5 range: 28 - 33
No.6 range: 34 - 39
No.7 range: 40 - 45
No.8 range: 46 - 51
No.9 range: 52 - 57