Voynichese is a numeric cipher?

[Juan_Sali]

An idea for a cipher with a kind of numeric component.
Taking the scheme of prefix - core - sufix.
The core represents a plain letter, and the set of sufix-prefix around the core moves the letter
certain number of positions, in the style of a caesar cipher.
This will reduce the field, 1 core per plain letter is enough, and the number of sets of prefix-sufix doesnt 
need to be high to have a high number of options to encode every letter.