Step 1: Divide the number into separate digits:
58876 => 5 8 8 7 6
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
5 to 8 = 3
8 to 8 = 0
8 to 7 = 1
7 to 6 = 1
6 to 5 = 1
Step 3: Combine the filters to a string:
3 0 1 1 1 = 30111