new_contents: # Problem 3
  # 10.0 points possible (graded)
  # Numbers in Mandarin follow 3 simple rules:
  
  # There are words for each of the digits from 0 to 10.
  # For numbers 11-19, the number is pronounced as "ten digit", so for example, 16 would be pronounced (using Mandarin) as "ten six".
  # For numbers between 20 and 99, the number is pronounced as “digit ten digit”, so for example, 37 would be pronounced (using Mandarin) as "three ten seven". If the digit is a zero, it is not included.
  
  # We want to write a procedure that converts an American number (between 0 and 99), written as a string, into the equivalent Mandarin.
  
  def convert_to_mandarin(us_num):
      '''
      us_num, a string representing a US number 0 to 99
      returns the string mandarin representation of us_num
      '''
      trans = {'0':'ling', '1':'yi', '2':'er', '3':'san', '4': 'si',
            '5':'wu', '6':'liu', '7':'qi', '8':'ba', '9':'jiu', '10': 'shi'}
      us_integer = int(us_num)
      if us_integer <= 10 and us_integer >= 0:
        return trans[us_num]
      else:
        stringNum = ""
        listNum = list(us_num)
        if us_integer <= 19 and us_integer > 10:
          stringNum += 'shi '
          stringNum += trans[listNum[1]]
          return stringNum
        elif us_integer >= 20 and us_integer < 100:
          stringNum += trans[listNum[0]]
          stringNum += ' shi'
          if listNum[1] != '0':
            stringNum += " "
            stringNum += trans[listNum[1]]
          return stringNum
  
  
  
  
  # convert_to_mandarin('36') will return san shi liu
  # convert_to_mandarin('20') will return er shi
  # convert_to_mandarin('16') will return shi liu
  print(convert_to_mandarin('16'))
subject: Write a procedure that converts an American number into the equivalent Mandarin.