new_contents: #Kunal Gautam
  #Codewars : @Kunalpod
  #Problem name: String Incrementer
  #Problem level: 5 kyu
  
  import re
  def increment_string(strng):
      if not strng or strng[-1] not in "0123456789":    return strng + "1"
      num = [x for x in re.findall('[0-9]*', strng) if x]
      return strng.replace(num[-1], ('{:0>'+str(len(num[-1]))+'}').format(int(num[-1])+1))
  
subject: Create string_incrementer.py