new_contents: def is_divisible_by_6(s):
      if not is_even(s): return []
      return list(
               filter(checker, 
                 (s.replace('*', str(n)).lstrip('0') for n in range(10))
                      )
                       )    
          
  
  checker = lambda n: is_even(n) and sum(map(int, str(n))) % 3 == 0 if n else False    
          
  is_even = lambda s: any(s[-1].endswith(i) for i in '02468*')
  
subject: Create 6kyu_simple_fun_is_divisible_by_6.py