Why not look up which group the user belongs to and set appropriate variables or use GOSUB? Since the groups are mutually exclusive, you'd do
code:
SELECT
CASE Ingroup('klas-awebb')
  $group=1
  GOSUB group1
CASE Ingroup('klas"'
  $group=2
  GOSUB group2
CASE Ingroup('klas-awebo')
  $group=3
  GOSUB group3
CASE 1
  $group=0
ENDSELECT
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There are two types of vessels, submarines and targets.