numbers = [12, 1210, 1300, 2020, 21200, 5]

occurrences = function(test, values)
    count = 0
    for i in values
        if i.val == test then count = count + 1
    end for
    return count
end function

for number in numbers
    check = "" + number
    digits = check.values
    describing = true
    for digit in digits.indexes
        if digits[digit].val != occurrences(digit, digits) then
            describing = false
        end if
    end for
    if describing then
        print number + " is self describing"
    else
        print number + " is not self describing"
    end if
end for