C1111233131211111211113313331333133313331312331333131133133313331123313223121   >>    C111123313121111121111331333133313331333131233133313113313331333112331322312   <<    C1111233131211111211113313331333133313331312331333131133133313331123313223123   >>      C1111233131211111211113313331333133313331312331333131133133313331123313223122   >>