> For the complete documentation index, see [llms.txt](https://jaywin.gitbook.io/leetcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jaywin.gitbook.io/leetcode/solutions/0884-uncommon-words-from-two-sentences.md).

# 0884. Uncommon Words from Two Sentences

<https://leetcode.com/problems/uncommon-words-from-two-sentences>

## Description

A **sentence** is a string of single-space separated words where each word consists only of lowercase letters.

A word is **uncommon** if it appears exactly once in one of the sentences, and **does not appear** in the other sentence.

Given two **sentences** `s1` and `s2`, return *a list of all the **uncommon words***. You may return the answer in **any order**.

**Example 1:**

```
**Input:** s1 = "this apple is sweet", s2 = "this apple is sour"
**Output:** ["sweet","sour"]
```

**Example 2:**

```
**Input:** s1 = "apple apple", s2 = "banana"
**Output:** ["banana"]
```

**Constraints:**

* `1 <= s1.length, s2.length <= 200`
* `s1` and `s2` consist of lowercase English letters and spaces.
* `s1` and `s2` do not have leading or trailing spaces.
* All the words in `s1` and `s2` are separated by a single space.

## ac

```java
```