C3123121111331312121111331333132313331333133313232223213331323222223211   >>    C312312111133131212111133133313231333133313331323222321333132322222321   <<    C3123121111331312121111331333132313331333133313232223213331323222223213   >>      C3123121111331312121111331333132313331333133313232223213331323222223212   >>