random combo generator

[jmbjr]

Does this already exist?
If not:

1. generate purely random
2. generate random viable
3. generate random unviable

Any command can be given a species or background to generate the other half

!randcombo
!randcombo -viable
!randcombo -unviable
!randcombo Ce
!randcombo Ce -viable
!randcombo Ce -unviable

This is probably too much work