Step 1: Divide the number into separate digits:
9296 => 9 2 9 6
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 2 = 7
2 to 9 = 7
9 to 6 = 3
6 to 9 = 3
Step 3: Combine the filters to a string:
7 7 3 3 = 7733