B3311331313231311331322331333132233131133132233133313231333132322211232321   >>    B331133131323131133132233133313223313113313223313331323133313232221123232   <<    B3311331313231311331322331333132233131133132233133313231333132322211232323   >>      B3311331313231311331322331333132233131133132233133313231333132322211232322   >>