6 6 60 9   Exclude X-particles
 This request appears on the screen in the process is 
not completely specified. 
 This option can provide you a possibility to restrict 
additional particles.  For example:
               W+>1,Z
excludes diagrams with more than 1 additional W+ and diagrams
containing  at least one additional Z boson.

  Use empty input to get the full set of diagrams.
