B3311331313231311331322331333132313331323131323223313331311331311331323212121   >>    B331133131323131133132233133313231333132313132322331333131133131133132321212   <<    B3311331313231311331322331333132313331323131323223313331311331311331323212123   >>      B3311331313231311331322331333132313331323131323223313331311331311331323212122   >>