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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_clients(session, verbose):
 """Add clients to the ATVS Keystroke database."""

  for ctype in ['Genuine', 'Impostor']:
    for cdid in userid_clients:
      cid = ctype + '_%d' % cdid
      if verbose>1: print("  Adding user '%s' of type '%s'..." % (cid, ctype))
      session.add(Client(cid, ctype, cdid))