6 6 51 5  Composite particle 
 The name of one "in" particle is absent in the 
table of particles. You are prompted to describe 
this particle as a composite one.
  The generic form of  input is a list of partons 
(known to CompHEP), separated by commas.
  Example: 'proton' consist of: u,U,d,D,G
           In this case all subprocesses for the
           proton constituents will be generated.