Multiple Theme to Theme

Another common variation is when more than one idea in a Theme is developed or progressed across Themes only. An idea may be developed in all or some Themes that follow.

multiple themes to multiple themes
THEME a. from 1 to 2, 3, 4, 5.
THEME b.  from 1 to 2.
THEME c.  from 3 to 4, 5.