there are all of the letters of the alphabet and an ! and a ?
28
28
26 unkowns
There are so many different types because they are all used for different purposes in different situations.
26 letters( the English alphabet) and a (!) and a (?)
493 different ones, but for all in total... Unknown.
there are many different types
I don't even think unknowns have anything to do with celebi
There are many different types of scientists because one person could not handle all the information of geology, astrology, and other types of science. Since there are numerous types of sciences, there has to be many different types of scientists, so there are many different scientists because there are many different sciences.
There are 15 types of different types of sharks.
there are 3 different types of plastids
there are 19 different types of clutch