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   This is an entry to the next menu level which 
allows the user to set the parameters of the Monte 
Carlo integrator VEGAS and to launch it.
   After VEGAS integration the information about
the cross section is displayed on the screen and is 
written in the session.dat file. 
   It is possible to generate various distributions 
in the process of integration.
   Event generation can be started when the 
integration is completed.