C11112331312111112111133132313331333133313232213331322132313121   >>    C1111233131211111211113313231333133313331323221333132213231312   <<    C11112331312111112111133132313331333133313232213331322132313123   >>      C11112331312111112111133132313331333133313232213331322132313122   >>