Conjugate letters are formed
when two letters are joined together to form another letter
that is a distinguished letter from the basic two letters,
but the shapes of the two letters are conserved in the new
letter to some percent.
Conjugate letters are formed with consonants, not vowels.
There are 73 conjugate letters that are constructed using
two letters.There are 42 conjugate letters that are constructed
using 3 and 4 letters.
For our understanding we would divide conjugate letters
according to the rule of their formation. The first letter
will be called "primary" letter. The second letter
will be called "secondary" letter and the third
and fourth letters will be called "supporting"
For example if "ta+pa" make "tpa",
then "ta" is the primary letter, "pa"
is the secondary letter although contribution wise "ta"
will appear as a symbol below "pa" making "pa"
Some of the conjugate letters are designed following similar
principles. Some examples are "any letter + ka"
would have the lowest portion of "ka" under the
primary letter such as "sa+ka = ska" and "la+ka
So in reality, some of the styles in the design of conjugate
letters make the task of learning conjugate letters easier.