C11112331312111112111133132313331333133313232213331312111112233231   >>    C1111233131211111211113313231333133313331323221333131211111223323   <<    C11112331312111112111133132313331333133313232213331312111112233233   >>      C11112331312111112111133132313331333133313232213331312111112233232   >>