Step 1: Divide the number into separate digits:
92356 => 9 2 3 5 6
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 2 = 7
2 to 3 = 1
3 to 5 = 2
5 to 6 = 1
6 to 9 = 3
Step 3: Combine the filters to a string:
7 1 2 1 3 = 71213