C11112331312111112111133133313331333132112312111133231333132211   >>    C1111233131211111211113313331333133313211231211113323133313221   <<    C11112331312111112111133133313331333132112312111133231333132213   >>      C11112331312111112111133133313331333132112312111133231333132212   >>