C11112331312111112111133133313331333133313112113313331333133313232212323121   >>    C1111233131211111211113313331333133313331311211331333133313331323221232312   <<    C11112331312111112111133133313331333133313112113313331333133313232212323123   >>      C11112331312111112111133133313331333133313112113313331333133313232212323122   >>