C11112331312111112111133132313331333133313232213331333113313331312111   >>    C1111233131211111211113313231333133313331323221333133311331333131211   <<    C11112331312111112111133132313331333133313232213331333113313331312113   >>      C11112331312111112111133132313331333133313232213331333113313331312112   >>