C11112331312111112111133133313331333132313233313231333132221222121   >>    C1111233131211111211113313331333133313231323331323133313222122212   <<    C11112331312111112111133133313331333132313233313231333132221222123   >>      C11112331312111112111133133313331333132313233313231333132221222122   >>