new_contents: class nIDError(value, Exception):
      def __init__(self,value):
          self.value=value
      def __str__(self):
          return repr(self.value)
  def parse(nid,field):
      try:
          split=nid.split("@")
          count=0
          loop=0
          output=""
          for i in field:
              count=count+1
          for i in split:
              if i.startswith(field):
                  for u in i:
                      if loop <= count:
                          pass
                      else:
                          output=output+u
                      loop=loop+1
          return output
      except:
          raise nIDError("Could not Parse nid")
  
subject: Create nID.py