B33113313132313113313223313331323133313223313231333133313211231211111333212121   >>    B3311331313231311331322331333132313331322331323133313331321123121111133321212   <<    B33113313132313113313223313331323133313223313231333133313211231211111333212123   >>      B33113313132313113313223313331323133313223313231333133313211231211111333212122   >>