C11112331312111112111133133313331333132313133313113313331333132213111   >>    C1111233131211111211113313331333133313231313331311331333133313221311   <<    C11112331312111112111133133313331333132313133313113313331333132213113   >>      C11112331312111112111133133313331333132313133313113313331333132213112   >>