B3311331313231311331322331333132333131333132233133313232233132313123221231   >>    B331133131323131133132233133313233313133313223313331323223313231312322123   <<    B3311331313231311331322331333132333131333132233133313232233132313123221233   >>      B3311331313231311331322331333132333131333132233133313232233132313123221232   >>