To show you how to calculate the Distances filter for a Pick 2 number here a step by step example.
Step 1: Divide the number into separate digits: 21 => 2 1 Step 2: Calculate the distance between each digit and the next (the last digit with the first): 2 to 1 = 1 1 to 2 = 1 Step 3: Combine the filters to a string: 1 1 = 11