C11112331312111112111133132313331333133313232213331333232131121   >>    C1111233131211111211113313231333133313331323221333133323213112   <<    C11112331312111112111133132313331333133313232213331333232131123   >>      C11112331312111112111133132313331333133313232213331333232131122   >>