The distinct sift will return only unique elements in a list.

The following sift when added to a command will skip the first 2 elements, then return the distinct remaining elements and then finally count the number of remaining elements that match the regular expression [0-9]:

    "sift", wasListToCSV([
        "skip", 2,
        "distinct", "",
        "count", "[0-9]"
    ]),

Given the input

data=a,1,c,2,c,3,h,2,h,5,j,5

the following transformations will take place:

1. skip, 2 data=c,2,c,3,h,2,h,5,j,5,
2. distinct data=c,2,3,h,5,j,
3. count, [0-9] data=6

and expected output is:

data=6

• The empty string must be passed as an argument to the distinct sift.