Step 1: Divide the number into separate digits:
34914 => 3 4 9 1 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
3 to 4 = 1
4 to 9 = 5
9 to 1 = 8
1 to 4 = 3
4 to 3 = 1
Step 3: Combine the filters to a string:
1 5 8 3 1 = 15831