Step 1: Divide the number into separate digits:
07411 => 0 7 4 1 1
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 7 = 7
7 to 4 = 3
4 to 1 = 3
1 to 1 = 0
1 to 0 = 1
Step 3: Combine the filters to a string:
7 3 3 0 1 = 73301