C11112331312111112111133132313331333133313232213331323133313133121   >>    C1111233131211111211113313231333133313331323221333132313331313312   <<    C11112331312111112111133132313331333133313232213331323133313133123   >>      C11112331312111112111133132313331333133313232213331323133313133122   >>