C11112331312111112111133133313331333132112312111133231333132212131   >>    C1111233131211111211113313331333133313211231211113323133313221213   <<    C11112331312111112111133133313331333132112312111133231333132212133   >>      C11112331312111112111133133313331333132112312111133231333132212132   >>