Step 1: Divide the number into separate digits:
88033 => 8 8 0 3 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 8 = 0
8 to 0 = 8
0 to 3 = 3
3 to 3 = 0
3 to 8 = 5
Step 3: Combine the filters to a string:
0 8 3 0 5 = 08305