code: def add_uppercase(table):
      
      orig = table.copy()
      orig.update(
          dict((k.capitalize(), v.capitalize()) for k, v in table.items()))
  
      return orig
docs: Extend the table with uppercase options
  
      >>> print("а" in add_uppercase({"а": "a"}))
      True
      >>> print(add_uppercase({"а": "a"})["а"] == "a")
      True
      >>> print("А" in add_uppercase({"а": "a"}))
      True
      >>> print(add_uppercase({"а": "a"})["А"] == "A")
      True
      >>> print(len(add_uppercase({"а": "a"}).keys()))
      2
      >>> print("Аа" in add_uppercase({"аа": "aa"}))
      True
      >>> print(add_uppercase({"аа": "aa"})["Аа"] == "Aa")
      True