Special character adding in command window

Hi I want to ask how we can add a special charecter like gama or beta in the command window.

For ex I want to write

syms a b gama beta

Thanks for your help

[Oleg Komarov]

I am afraid it's not possible.

Answer 1

[Walter Roberson]

You are restricted to writing them as parts of strings or comments: they will be treated as syntax errors in all other contexts.

There is no special support for writing the characters, just whatever keyboard support your operating system provides (e.g., "virtual keyboard", copying and pasting ffrom another document, alt-green keyboard sequences, alt-number keyboard sequences.)