B3311331313231311331322331333132313232233132322223313231333132312312311   >>    B331133131323131133132233133313231323223313232222331323133313231231231   <<    B3311331313231311331322331333132313232233132322223313231333132312312313   >>      B3311331313231311331322331333132313232233132322223313231333132312312312   >>