code: def _merge_lists(b, c):
      count = 0
      i = j = 0
      a = []
      while i < len(b) and j < len(c):
          count += 1
          if b[i] <= c[j]:
              a.append(b[i])
              i += 1
          else:
              a.append(c[j])
              j += 1
      if i == len(b):
          a += c[j:]
      else:
          a += b[i:]
      return a, count
  
file_path: nltk/nltk/misc/sort.py
label_desc: Use image node_id 3 for calling a global function with example usage: _merge_lists(b, c) and returns: a,  count