C11112331312111112111133133313331333131133132313331322333123212121   >>    C1111233131211111211113313331333133313113313231333132233312321212   <<    C11112331312111112111133133313331333131133132313331322333123212123   >>      C11112331312111112111133133313331333131133132313331322333123212122   >>