C1111233131211111211113313331333133313331312211113313331311331322331311   >>    C111123313121111121111331333133313331333131221111331333131133132233131   <<    C1111233131211111211113313331333133313331312211113313331311331322331313   >>      C1111233131211111211113313331333133313331312211113313331311331322331312   >>