!BRIEF [-seed <int>] [-n <number>] [-p <percent>] [-i] <input> [-o] <output>
!PARAMETER -i
  !TYPE string
  !REQUIRED true
  !BRIEF Input file name
  !KEYLESS 1
!END
!PARAMETER -o
  !TYPE string
  !REQUIRED false
  !BRIEF Output file name
  !KEYLESS 2
!END
!PARAMETER -p
  !TYPE float
  !REQUIRED false
  !BRIEF Percentage of output molecules
!END
!PARAMETER -n
  !TYPE int
  !REQUIRED false
  !BRIEF Number of output molecules
!END
!PARAMETER -seed
  !TYPE int
  !REQUIRED false
  !BRIEF Integer value for random seed, default is system time
!END
