C11112331312111112111133133313231333132322121111133313231322233311   >>    C1111233131211111211113313331323133313232212111113331323132223331   <<    C11112331312111112111133133313231333132322121111133313231322233313   >>      C11112331312111112111133133313231333132322121111133313231322233312   >>