B3311331313231311331322331333132333132311211331333132322331323221311   >>    B331133131323131133132233133313233313231121133133313232233132322131   <<    B3311331313231311331322331333132333132311211331333132322331323221313   >>      B3311331313231311331322331333132333132311211331333132322331323221312   >>