[*]Profan

s : String - the To bearbeitende String
n1 : Integer - position
n2 : Integer - amount
D : String - Separator (Delimiter)

Result: String

If no Separator indicated is:
the Result is a String, the n2 characters ex position n1 from String s contains.
If one Separator indicated is:
the Result is a String, the n2 Teilstrings ex whom Teilstring n1 from String s contains.