CharlesAndJames have CharlesAndJamesNumber of zero.

I mean, they are JamesAndCharles.


everybody else has CharlesAndJamesNumber of "not-zero"  (4).

because, well, they are NOT CharlesAndJames.


James has an ErdosNumber of 4
a KiboNumber of 1, a WardNumber of 2, and a KentNumber of 1.

ShamelessSelfPromotion?