  In a preceding work [M. Lang, K. Kumar, A simple and general approach for
reversible condensation polymerization with cyclization, Macromolecules 54
(2021) 7021], we have introduced a simple recursive scheme that allows to treat
stepwise linear reversible polymerizations of any kind with cyclization. This
approach is used to discuss the polymerization of linear Gaussian strands (LGS)
with two different reactive groups $A$ and $B$ on either chain end that
participate in two orthogonal reactions and the strictly alternating
copolymerization of LGS that carry $A$ reactive groups with LGS equipped with
type $B$ reactive groups. The former of these cases has not been discussed
theoretically in literature, the latter only regarding some special cases. We
provide either analytical expressions or exact numerical solutions for the
general cases with and without cyclization. Weight distributions, averages,
polydispersity, and the weight fractions of cyclic and linear species are
computed. All numerical solutions were tested by Monte-Carlo simulations.
