C11112331312111112111133133313331333132313233313221333132231311   >>    C1111233131211111211113313331333133313231323331322133313223131   <<    C11112331312111112111133133313331333132313233313221333132231313   >>      C11112331312111112111133133313331333132313233313221333132231312   >>