The difference between the 1st and 2nd digits is divided into 7 portions

The difference between the 1st and 2nd digit of the lottery numbers is divided into 7 parts.

Part 1: 1 - 7

Part 2: 8 - 14

Part 3: 15 - 21

Part 4: 22 - 28

Part 5: 29 - 35

Part 6: 36 - 42

Part 7: 43 - 49