B3311331313231311331322331333132323133313223313231323133313221231   >>    B331133131323131133132233133313232313331322331323132313331322123   <<    B3311331313231311331322331333132323133313223313231323133313221233   >>      B3311331313231311331322331333132323133313223313231323133313221232   >>