Within the params.txt file below commented sections with # symbol (do not change the comments) add:

Actions in given format:

{variable} := {variable} {operation} {variable}
...

Alphabet in given format (one symbol for each action):

{symbol}
...

Word that is going to be analyzed in given format:

{word consisting only symbols of the alphabet defined above}

Variables if you wish to change the standard recognized symbols (python x.isalpha) in given format:

{variable name}
...