Step 1: Divide the number into separate digits:
8086 => 8 0 8 6
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 0 = 8
0 to 8 = 8
8 to 6 = 2
6 to 8 = 2
Step 3: Combine the filters to a string:
8 8 2 2 = 8822