B3311331313231311331322331333132233131133132233133313231333132212311   >>    B331133131323131133132233133313223313113313223313331323133313221231   <<    B3311331313231311331322331333132233131133132233133313231333132212313   >>      B3311331313231311331322331333132233131133132233133313231333132212312   >>