B33113313132313113313223313331323221333132333121211113311212111   >>    B3311331313231311331322331333132322133313233312121111331121211   <<    B33113313132313113313223313331323221333132333121211113311212113   >>      B33113313132313113313223313331323221333132333121211113311212112   >>