class range:
start: int = 0
stop: int = 0
step: int = 0
def __iter__(self) -> range_iterator: pass
def __str__(self) -> str: pass
class range_iterator:
def __init__(self): pass
def __next__(self) -> int: pass
class slice:
indices: int = 0
start: int = 0
stop: int = 0
step: int = 0
def __str__(self) -> str: pass