code: def chars_to_byte(self, s: str):
      return (69 * self.CHARS.index(s[1])) + (self.CHARS.index(s[0]))
  
file_path: Ciphey/ciphey/basemods/Decoders/base69.py
imports: import re
  from math import ceil
  from typing import Dict, Optional
  from ciphey.iface import Config, Decoder, ParamSpec, T, U, WordList, registry
label_desc: Use image node_id 3 for calling the Base69 obj's underlying member method code with example usage: obj.chars_to_byte(s) and returns: unknown