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leetcode-cn/problem (English)/单词转换(English) [word-transformer-lcci].html
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<p>Given two words of equal length that are in a dictionary, write a method to transform one word into another word by changing only one letter at a time. The new word you get in each step must be in the dictionary.</p>
<p>Write code to return a possible transforming sequence. If there is more than one sequence, return any of them.</p>
<p><strong>Example 1:</strong></p>
<pre>
<strong>Input:</strong>
beginWord = &quot;hit&quot;,
endWord = &quot;cog&quot;,
wordList = [&quot;hot&quot;,&quot;dot&quot;,&quot;dog&quot;,&quot;lot&quot;,&quot;log&quot;,&quot;cog&quot;]
<strong>Output:</strong>
[&quot;hit&quot;,&quot;hot&quot;,&quot;dot&quot;,&quot;lot&quot;,&quot;log&quot;,&quot;cog&quot;]
</pre>
<p><strong>Example 2:</strong></p>
<pre>
<strong>Input:</strong>
beginWord = &quot;hit&quot;
endWord = &quot;cog&quot;
wordList = [&quot;hot&quot;,&quot;dot&quot;,&quot;dog&quot;,&quot;lot&quot;,&quot;log&quot;]
<strong>Output: </strong>[]
<strong>Explanation:</strong>&nbsp;<em>endWord</em> &quot;cog&quot; is not in the dictionary, so there&#39;s no possible transforming sequence.</pre>
<p>Given two words of equal length that are in a dictionary, write a method to transform one word into another word by changing only one letter at a time. The new word you get in each step must be in the dictionary.</p>
<p>Write code to return a possible transforming sequence. If there is more than one sequence, return any of them.</p>
<p><strong>Example 1:</strong></p>
<pre>
<strong>Input:</strong>
beginWord = &quot;hit&quot;,
endWord = &quot;cog&quot;,
wordList = [&quot;hot&quot;,&quot;dot&quot;,&quot;dog&quot;,&quot;lot&quot;,&quot;log&quot;,&quot;cog&quot;]
<strong>Output:</strong>
[&quot;hit&quot;,&quot;hot&quot;,&quot;dot&quot;,&quot;lot&quot;,&quot;log&quot;,&quot;cog&quot;]