Step 1: Divide the number into separate digits:
37035 => 3 7 0 3 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
3 to 7 = 4
7 to 0 = 7
0 to 3 = 3
3 to 5 = 2
5 to 3 = 2
Step 3: Combine the filters to a string:
4 7 3 2 2 = 47322