Suppose you selected three integers between 0-9, i.e. 2,3, and 5. Add these numbers to get the sum (2+3+5 = 10). Here, 0 is the final ank for open. Similarly, repeat the process and get

Suppose you selected three integers between 0-9, i.e. 2,3, and 5. Add these numbers to get the sum (2+3+5 = 10). Here, 0 is the final ank for open. Similarly, repeat the process and get