C11112331312111112111133133313331333132313233313331312111133133313223313131121   >>    C1111233131211111211113313331333133313231323331333131211113313331322331313112   <<    C11112331312111112111133133313331333132313233313331312111133133313223313131123   >>      C11112331312111112111133133313331333132313233313331312111133133313223313131122   >>