Step 1: Divide the number into separate digits:
07262 => 0 7 2 6 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 7 = 7
7 to 2 = 5
2 to 6 = 4
6 to 2 = 4
2 to 0 = 2
Step 3: Combine the filters to a string:
7 5 4 4 2 = 75442