<h2><a href="https://leetcode.com/problems/circular-sentence/">2490. Circular Sentence</a></h2><h3>Easy</h3><hr><div><p>A <strong>sentence</strong> is a list of words that are separated by a<strong> single</strong> space with no leading or trailing spaces.</p>

<ul>

<li>For example, <code>"Hello World"</code>, <code>"HELLO"</code>, <code>"hello world hello world"</code> are all sentences.</li>

</ul>

<p>Words consist of <strong>only</strong> uppercase and lowercase English letters. Uppercase and lowercase English letters are considered different.</p>

<p>A sentence is <strong>circular </strong>if:</p>

<ul>

<li>The last character of a word is equal to the first character of the next word.</li>

<li>The last character of the last word is equal to the first character of the first word.</li>

</ul>

<p>For example, <code>"leetcode exercises sound delightful"</code>, <code>"eetcode"</code>, <code>"leetcode eats soul" </code>are all circular sentences. However, <code>"Leetcode is cool"</code>, <code>"happy Leetcode"</code>, <code>"Leetcode"</code> and <code>"I like Leetcode"</code> are <strong>not</strong> circular sentences.</p>

<p>Given a string <code>sentence</code>, return <code>true</code><em> if it is circular</em>. Otherwise, return <code>false</code>.</p>

<p>&nbsp;</p>

<p><strong class="example">Example 1:</strong></p>

<pre><strong>Input:</strong> sentence = "leetcode exercises sound delightful"

<strong>Output:</strong> true

<strong>Explanation:</strong> The words in sentence are ["leetcode", "exercises", "sound", "delightful"].

- leetcod<u>e</u>'s&nbsp;last character is equal to <u>e</u>xercises's first character.

- exercise<u>s</u>'s&nbsp;last character is equal to <u>s</u>ound's first character.

- soun<u>d</u>'s&nbsp;last character is equal to <u>d</u>elightful's first character.

- delightfu<u>l</u>'s&nbsp;last character is equal to <u>l</u>eetcode's first character.

The sentence is circular.</pre>

<p><strong class="example">Example 2:</strong></p>

<pre><strong>Input:</strong> sentence = "eetcode"

<strong>Output:</strong> true

<strong>Explanation:</strong> The words in sentence are ["eetcode"].

- eetcod<u>e</u>'s&nbsp;last character is equal to <u>e</u>etcode's first character.

The sentence is circular.</pre>

<p><strong class="example">Example 3:</strong></p>

<pre><strong>Input:</strong> sentence = "Leetcode is cool"

<strong>Output:</strong> false

<strong>Explanation:</strong> The words in sentence are ["Leetcode", "is", "cool"].

- Leetcod<u>e</u>'s&nbsp;last character is <strong>not</strong> equal to <u>i</u>s's first character.

The sentence is <strong>not</strong> circular.</pre>

<p>&nbsp;</p>

<p><strong>Constraints:</strong></p>

<ul>

<li><code>1 &lt;= sentence.length &lt;= 500</code></li>

<li><code>sentence</code> consist of only lowercase and uppercase English letters and spaces.</li>

<li>The words in <code>sentence</code> are separated by a single space.</li>

<li>There are no leading or trailing spaces.</li>

</ul>

</div>