Step 1: Divide the number into separate digits:
09441 => 0 9 4 4 1
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 9 = 9
9 to 4 = 5
4 to 4 = 0
4 to 1 = 3
1 to 0 = 1
Step 3: Combine the filters to a string:
9 5 0 3 1 = 95031