new_contents: #Kunal Gautam
  #Codewars : @Kunalpod
  #Problem name: First non-repeating letter
  #Problem level: 5 kyu
  
  def first_non_repeating_letter(string):
      for i in string:
          if string.lower().count(i.lower()) == 1:
              return i
      return ""        
  
subject: Create first_non_repeating_letter.py