Step 1: Divide the number into separate digits:
34635 => 3 4 6 3 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
3 to 4 = 1
4 to 6 = 2
6 to 3 = 3
3 to 5 = 2
5 to 3 = 2
Step 3: Combine the filters to a string:
1 2 3 2 2 = 12322