B3311331313231311331322331333132313331322121133133313331322333132313121   >>    B331133131323131133132233133313231333132212113313331333132233313231312   <<    B3311331313231311331322331333132313331322121133133313331322333132313123   >>      B3311331313231311331322331333132313331322121133133313331322333132313122   >>