B3311331313231311331322331333132313231333131323223313231333132322131232311   >>    B331133131323131133132233133313231323133313132322331323133313232213123231   <<    B3311331313231311331322331333132313231333131323223313231333132322131232313   >>      B3311331313231311331322331333132313231333131323223313231333132322131232312   >>