Step 1: Divide the number into separate digits:
99410 => 9 9 4 1 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 9 = 0
9 to 4 = 5
4 to 1 = 3
1 to 0 = 1
0 to 9 = 9
Step 3: Combine the filters to a string:
0 5 3 1 9 = 05319