C3123121111331312121111331333132313331333133313331313231333132322121221   >>    C312312111133131212111133133313231333133313331333131323133313232212122   <<    C3123121111331312121111331333132313331333133313331313231333132322121223   >>      C3123121111331312121111331333132313331333133313331313231333132322121222   >>