C111123313121111121111331323133313331333132333133313121111331333133313123232211   >>    C11112331312111112111133132313331333133313233313331312111133133313331312323221   <<    C111123313121111121111331323133313331333132333133313121111331333133313123232213   >>      C111123313121111121111331323133313331333132333133313121111331333133313123232212   >>