How to choose the birthday number of two-color ball?

You can add the birthday year or month, for example, 1988, 1+9+8+8 is 26, then the corresponding 1953 is 18, so it can be arranged as 07, 12, 18. Each note number of two-color ball consists of six red ball numbers and 1 blue ball numbers. Red ball number is selected from 1-33, and blue ball number is selected from 1- 16. Some people use the family's birthday or mobile phone number and license plate number to combine numbers, and some people "entrust" the betting machine to choose randomly.