C111123313121111121111331333133313331333131233133313121111133313331232132231211   >>    C11112331312111112111133133313331333133313123313331312111113331333123213223121   <<    C111123313121111121111331333133313331333131233133313121111133313331232132231213   >>      C111123313121111121111331333133313331333131233133313121111133313331232132231212   >>