Step 1: Divide the number into separate digits:
5714 => 5 7 1 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
5 to 7 = 2
7 to 1 = 6
1 to 4 = 3
4 to 5 = 1
Step 3: Combine the filters to a string:
2 6 3 1 = 2631