B3311331313231311331322331333132333131232233132313233313231323223311   >>    B331133131323131133132233133313233313123223313231323331323132322331   <<    B3311331313231311331322331333132333131232233132313233313231323223313   >>      B3311331313231311331322331333132333131232233132313233313231323223312   >>