try:
    Exception().__cause__
except AttributeError:
    print("SKIP")
    raise SystemExit

try:
    import traceback
except:
    print("SKIP")
    raise SystemExit


def print_exc_info(e, chain=True):
    print("-" * 72)
    traceback.print_exception(None, e, e.__traceback__, chain=chain)
    print("-" * 72)
    print()


try:
    try:
        1 / 0
    except Exception as inner:
        raise RuntimeError() from inner
except Exception as e:
    print_exc_info(e, chain=False)
    print_exc_info(e)
print()

try:
    try:
        1 / 0
    except Exception as inner:
        raise RuntimeError() from OSError()
except Exception as e:
    print_exc_info(e)
print()


try:
    try:
        1 / 0
    except Exception as inner:
        raise RuntimeError()
except Exception as e:
    print_exc_info(e)
print()

try:
    try:
        1 / 0
    except Exception as inner:
        raise RuntimeError() from None
except Exception as e:
    print_exc_info(e)

try:
    try:
        raise RuntimeError()
    except Exception as inner:
        1 / 0
except Exception as e:
    print_exc_info(e)

try:
    try:
        1 / 0
    except Exception as inner:
        raise inner
except Exception as e:
    print_exc_info(e, chain=False)
    print_exc_info(e)
print()