B3311331313231311331322331333132233131133132233133313231333132311321311   >>    B331133131323131133132233133313223313113313223313331323133313231132131   <<    B3311331313231311331322331333132233131133132233133313231333132311321313   >>      B3311331313231311331322331333132233131133132233133313231333132311321312   >>