A sentence is a string of single-space separated words where each word consists only of lowercase letters.
\n\nA word is uncommon if it appears exactly once in one of the sentences, and does not appear in the other sentence.
\n\nGiven two sentences s1 and s2, return a list of all the uncommon words. You may return the answer in any order.
\n
Example 1:
\n\nInput: s1 = "this apple is sweet", s2 = "this apple is sour"
\n\nOutput: ["sweet","sour"]
\n\nExplanation:
\n\nThe word "sweet" appears only in s1, while the word "sour" appears only in s2.
Example 2:
\n\nInput: s1 = "apple apple", s2 = "banana"
\n\nOutput: ["banana"]
\n\n
Constraints:
\n\n1 <= s1.length, s2.length <= 200s1 and s2 consist of lowercase English letters and spaces.s1 and s2 do not have leading or trailing spaces.s1 and s2 are separated by a single space.句子 是一串由空格分隔的单词。每个 单词 仅由小写字母组成。
\n\n如果某个单词在其中一个句子中恰好出现一次，在另一个句子中却 没有出现 ，那么这个单词就是 不常见的 。
\n\n给你两个 句子 s1 和 s2 ，返回所有 不常用单词 的列表。返回列表中单词可以按 任意顺序 组织。
\n\n
示例 1：
\n\n\n输入：s1 = \"this apple is sweet\", s2 = \"this apple is sour\"\n输出：[\"sweet\",\"sour\"]\n\n\n
示例 2：
\n\n\n输入：s1 = \"apple apple\", s2 = \"banana\"\n输出：[\"banana\"]\n\n\n
\n\n
提示：
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"book": null,
"isSubscribed": false,
"isDailyQuestion": false,
"dailyRecordStatus": null,
"editorType": "CKEDITOR",
"ugcQuestionId": null,
"style": "LEETCODE",
"exampleTestcases": "\"this apple is sweet\"\n\"this apple is sour\"\n\"apple apple\"\n\"banana\"",
"__typename": "QuestionNode"
}
}
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