C11112331312111112111133133313331333132322121111331323133311221123121   >>    C1111233131211111211113313331333133313232212111133132313331122112312   <<    C11112331312111112111133133313331333132322121111331323133311221123123   >>      C11112331312111112111133133313331333132322121111331323133311221123122   >>