B3311331313231311331322331333132233131133132233133313231333132212111113223231   >>    B331133131323131133132233133313223313113313223313331323133313221211111322323   <<    B3311331313231311331322331333132233131133132233133313231333132212111113223233   >>      B3311331313231311331322331333132233131133132233133313231333132212111113223232   >>