B3311331313231311331322331333132333131333132233133313231333132213233311   >>    B331133131323131133132233133313233313133313223313331323133313221323331   <<    B3311331313231311331322331333132333131333132233133313231333132213233313   >>      B3311331313231311331322331333132333131333132233133313231333132213233312   >>