C11111333133313232233133313331333133313223322121111133313123232321   >>    C1111133313331323223313331333133313331322332212111113331312323232   <<    C11111333133313232233133313331333133313223322121111133313123232323   >>      C11111333133313232233133313331333133313223322121111133313123232322   >>