Step 1: Divide the number into separate digits:
97433 => 9 7 4 3 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 7 = 2
7 to 4 = 3
4 to 3 = 1
3 to 3 = 0
3 to 9 = 6
Step 3: Combine the filters to a string:
2 3 1 0 6 = 23106