Divide the 4th digit of the lottery numbers (4-30) into 7 parts:
No.1 range: 4 - 7
No.2 range: 8 - 11
No.3 range: 12 - 15
No.4 range: 16 - 19
No.5 range: 20 - 23
No.6 range: 24 - 27
No.7 range: 28 - 30
Divide the 4th digit of the lottery numbers (4-30) into 7 parts:
No.1 range: 4 - 7
No.2 range: 8 - 11
No.3 range: 12 - 15
No.4 range: 16 - 19
No.5 range: 20 - 23
No.6 range: 24 - 27
No.7 range: 28 - 30