Step 1: Divide the number into separate digits:
46959 => 4 6 9 5 9
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
4 to 6 = 2
6 to 9 = 3
9 to 5 = 4
5 to 9 = 4
9 to 4 = 5
Step 3: Combine the filters to a string:
2 3 4 4 5 = 23445