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            "questionId": "1967",
            "questionFrontendId": "1839",
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            "title": "Longest Substring Of All Vowels in Order",
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            "content": "<p>A string is considered <strong>beautiful</strong> if it satisfies the following conditions:</p>\n\n<ul>\n\t<li>Each of the 5 English vowels (<code>&#39;a&#39;</code>, <code>&#39;e&#39;</code>, <code>&#39;i&#39;</code>, <code>&#39;o&#39;</code>, <code>&#39;u&#39;</code>) must appear <strong>at least once</strong> in it.</li>\n\t<li>The letters must be sorted in <strong>alphabetical order</strong> (i.e. all <code>&#39;a&#39;</code>s before <code>&#39;e&#39;</code>s, all <code>&#39;e&#39;</code>s before <code>&#39;i&#39;</code>s, etc.).</li>\n</ul>\n\n<p>For example, strings <code>&quot;aeiou&quot;</code> and <code>&quot;aaaaaaeiiiioou&quot;</code> are considered <strong>beautiful</strong>, but <code>&quot;uaeio&quot;</code>, <code>&quot;aeoiu&quot;</code>, and <code>&quot;aaaeeeooo&quot;</code> are <strong>not beautiful</strong>.</p>\n\n<p>Given a string <code>word</code> consisting of English vowels, return <em>the <strong>length of the longest beautiful substring</strong> of </em><code>word</code><em>. If no such substring exists, return </em><code>0</code>.</p>\n\n<p>A <strong>substring</strong> is a contiguous sequence of characters in a string.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> word = &quot;aeiaaio<u>aaaaeiiiiouuu</u>ooaauuaeiu&quot;\n<strong>Output:</strong> 13\n<b>Explanation:</b> The longest beautiful substring in word is &quot;aaaaeiiiiouuu&quot; of length 13.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> word = &quot;aeeeiiiioooauuu<u>aeiou</u>&quot;\n<strong>Output:</strong> 5\n<b>Explanation:</b> The longest beautiful substring in word is &quot;aeiou&quot; of length 5.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> word = &quot;a&quot;\n<strong>Output:</strong> 0\n<b>Explanation:</b> There is no beautiful substring, so return 0.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= word.length &lt;= 5 * 10<sup>5</sup></code></li>\n\t<li><code>word</code> consists of characters <code>&#39;a&#39;</code>, <code>&#39;e&#39;</code>, <code>&#39;i&#39;</code>, <code>&#39;o&#39;</code>, and <code>&#39;u&#39;</code>.</li>\n</ul>\n",
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            "exampleTestcases": "\"aeiaaioaaaaeiiiiouuuooaauuaeiu\"\n\"aeeeiiiioooauuuaeiou\"\n\"a\"",
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                    "code": "class Solution {\n    public int longestBeautifulSubstring(String word) {\n        \n    }\n}",
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                    "code": "class Solution(object):\n    def longestBeautifulSubstring(self, word):\n        \"\"\"\n        :type word: str\n        :rtype: int\n        \"\"\"\n        ",
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                    "code": "# @param {String} word\n# @return {Integer}\ndef longest_beautiful_substring(word)\n    \nend",
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            "hints": [
                "Start from each 'a' and find the longest beautiful substring starting at that index.",
                "Based on the current character decide if you should include the next character in the beautiful substring."
            ],
            "solution": null,
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            "sampleTestCase": "\"aeiaaioaaaaeiiiiouuuooaauuaeiu\"",
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