C111123313121111121111331333133313221333131121211113313233313331311312121   >>    C11112331312111112111133133313331322133313112121111331323331333131131212   <<    C111123313121111121111331333133313221333131121211113313233313331311312123   >>      C111123313121111121111331333133313221333131121211113313233313331311312122   >>