code: def sort_char_num(input_list):
      """
      Sort a list of strings first alphabetically and then numerically.
  
      :param input_list: input list of strings
      :type input_list: iterable
      :return: a sorted list of strings
      """
      return sorted(input_list, key=char_num_transformer)
  
imports: from __future__ import division
  import sys
  import math
  import numpy
  import re
  from .pycm_param import *
  from .pycm_error import pycmMatrixError
  from warnings import warn
  from functools import wraps
label_desc: Use image node_id 33 for calling a global function with example usage: sort_char_num(input_list) and returns: sorted