class rec1(object):
    def __new__(cls, counter):
        if counter > 0:
            rec1.__new__(rec1, counter-1)
        return object.__new__(cls)

class rec2(object):
    class __metaclass__(type):
        def __call__(cls, counter):
            if counter > 0:
                rec2.__call__(counter-1)
            return object.__new__(cls)

class rec3(object):
    def __new__(cls, counter):
        self = object.__new__(cls)
        self.__init__(counter)
        return self

    def __init__(self, counter):
        if counter > 0:
            rec3.__new__(rec3, counter-1)

class rec4(object):
    def __new__(cls, counter):
        if counter > 0:
            rec4.__call__(counter-1)
        return object.__new__(cls)

class rec5(object):
    def __new__(cls, counter):
        if counter > 0:
            rec5(counter-1)
        return object.__new__(cls)

class rec6(object):
    def __init__(self, counter):
        if counter > 0:
            rec6(counter-1)


if __name__ == '__main__':
    import sys
    for cls in [rec1, rec2, rec3, rec4, rec5, rec6]:
        for i in [250, 334, 500, 1000, 2000]:
            try:
                cls(i)
            except RuntimeError:
                print "%s stopped at %d" % (cls.__name__, i)
                break