Step 1: Divide the number into separate digits:
43237 => 4 3 2 3 7
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
4 to 3 = 1
3 to 2 = 1
2 to 3 = 1
3 to 7 = 4
7 to 4 = 3
Step 3: Combine the filters to a string:
1 1 1 4 3 = 11143