code: def DoBuildNumber(fsm):
      ns = fsm.memory.pop()
      ns = ns + fsm.input_symbol
      fsm.memory.append(ns)
  
imports: from .None import screen
  from .None import FSM
  import string
label_desc: Use image node_id 3 for calling a global function with example usage: DoBuildNumber(fsm) without return types