B3311331313231311331322331333132313331322121133133313331333131321133132322121   >>    B331133131323131133132233133313231333132212113313331333133313132113313232212   <<    B3311331313231311331322331333132313331322121133133313331333131321133132322123   >>      B3311331313231311331322331333132313331322121133133313331333131321133132322122   >>