B33113313132313113313223313331323223313232313331333133313121211   >>    B3311331313231311331322331333132322331323231333133313331312121   <<    B33113313132313113313223313331323223313232313331333133313121213   >>      B33113313132313113313223313331323223313232313331333133313121212   >>