Step 1: Divide the number into separate digits:
87363 => 8 7 3 6 3
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 7 = 1
7 to 3 = 4
3 to 6 = 3
6 to 3 = 3
3 to 8 = 5
Step 3: Combine the filters to a string:
1 4 3 3 5 = 14335