B3311331313231311331322331333131133132313331313232233131333132313231323221211   >>    B331133131323131133132233133313113313231333131323223313133313231323132322121   <<    B3311331313231311331322331333131133132313331313232233131333132313231323221213   >>      B3311331313231311331322331333131133132313331313232233131333132313231323221212   >>