text: from typing import List, Optional, Union
  
  def a(x: List[int]) -> List[str]:
      return <warning descr="Expected type 'List[str]', got 'List[List[int]]' instead">[x]</warning>
  
  def b(x: int) -> List[str]:
      return <warning descr="Expected type 'List[str]', got 'List[int]' instead">[1,2]</warning>
  
  def c() -> int:
      return <warning descr="Expected type 'int', got 'str' instead">'abc'</warning>
  
  def d(x: int) -> List[str]:
      return [str(x)]
  
  def e() -> int:
      pass
  
  def f() -> Optional[str]:
      x = int(input())
      if x > 0:
          return <warning descr="Expected type 'Optional[str]', got 'int' instead">42</warning>
      elif x == 0:
          return 'abc'
      else:
          return
  
  def g(x) -> int:
      if x:
          return <warning descr="Expected type 'int', got 'str' instead">'abc'</warning>
      else:
          return <warning descr="Expected type 'int', got 'dict' instead">{}</warning>
  
  def h(x) -> int:
      <warning descr="Expected type 'int', got 'None' instead">return</warning>
  
  def i() -> Union[int, str]:
      pass
  
  def j(x) -> <warning descr="Expected to return 'Union[int, str]', got no return">Union[int, str]</warning>:
      x = 42
  
  def k() -> None:
      if True:
          pass