C111123313121111121111331333133313331322121111331333133313231333132313232212121   >>    C11112331312111112111133133313331333132212111133133313331323133313231323221212   <<    C111123313121111121111331333133313331322121111331333133313231333132313232212123   >>      C111123313121111121111331333133313331322121111331333133313231333132313232212122   >>