Number of Pairings
6 styles for Romeo X 6 styles for Juliet = 36 different pairings.
Only 21 give unique dynamics (because of R/J symmetry)
butÖ Itís actually worse than that:
4 parameters with 3 choices (-,0,+) for each gives 34 = 81 combinations of which 45 are unique
And there are subclasses depending on values and initial conditions.