<p>You are given a string <code>sentence</code> that consist of words separated by spaces. Each word consists of lowercase and uppercase letters only.</p>

<p>We would like to convert the sentence to &quot;Goat Latin&quot; (a made-up language similar to Pig Latin.) The rules of Goat Latin are as follows:</p>

<ul>
	<li>If a word begins with a vowel (<code>&#39;a&#39;</code>, <code>&#39;e&#39;</code>, <code>&#39;i&#39;</code>, <code>&#39;o&#39;</code>, or <code>&#39;u&#39;</code>), append <code>&quot;ma&quot;</code> to the end of the word.

	<ul>
		<li>For example, the word <code>&quot;apple&quot;</code> becomes <code>&quot;applema&quot;</code>.</li>
	</ul>
	</li>
	<li>If a word begins with a consonant (i.e., not a vowel), remove the first letter and append it to the end, then add <code>&quot;ma&quot;</code>.
	<ul>
		<li>For example, the word <code>&quot;goat&quot;</code> becomes <code>&quot;oatgma&quot;</code>.</li>
	</ul>
	</li>
	<li>Add one letter <code>&#39;a&#39;</code> to the end of each word per its word index in the sentence, starting with <code>1</code>.
	<ul>
		<li>For example, the first word gets <code>&quot;a&quot;</code> added to the end, the second word gets <code>&quot;aa&quot;</code> added to the end, and so on.</li>
	</ul>
	</li>
</ul>

<p>Return<em> the final sentence representing the conversion from sentence to Goat Latin</em>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre><strong>Input:</strong> sentence = "I speak Goat Latin"
<strong>Output:</strong> "Imaa peaksmaaa oatGmaaaa atinLmaaaaa"
</pre><p><strong class="example">Example 2:</strong></p>
<pre><strong>Input:</strong> sentence = "The quick brown fox jumped over the lazy dog"
<strong>Output:</strong> "heTmaa uickqmaaa rownbmaaaa oxfmaaaaa umpedjmaaaaaa overmaaaaaaa hetmaaaaaaaa azylmaaaaaaaaa ogdmaaaaaaaaaa"
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= sentence.length &lt;= 150</code></li>
	<li><code>sentence</code> consists of English letters and spaces.</li>
	<li><code>sentence</code> has no leading or trailing spaces.</li>
	<li>All the words in <code>sentence</code> are separated by a single space.</li>
</ul>

class Solution {
public:
    unordered_set<char> vowelSet;

    string parseWord(string word, int cnt) {
        // check is vowel or not
        // cout<<word<<endl;
        string res = "";
        if (vowelSet.count(word[0])) {
            res = word + "ma";
        } else {
            res = word.substr(1) + word[0] + "ma";
        }
        while (cnt > 0) {
            res += 'a';
            cnt--;
        }
        return res;
    }

    string toGoatLatin(string sentence) {
        vowelSet = {'a','e','i','o','u','A','E','I','O','U'};

        if (!sentence.size()) {
            return "";
        }
        string res = "";
        int cnt = 1;
        int n = sentence.size();
        for (int i = 0; i < n; i++) {
            // cout<<i<<endl;
            int j = i;
            while (j < n && sentence[j] != ' ') {
                j++;
            }
            string parse = parseWord(sentence.substr(i, j-i), cnt);
            cnt++;
            res += parse + " ";
            while (j < n && sentence[j] == ' ') {
                j++;
            }
            i = j-1;
        }
        res.pop_back();
        return res;
    }
};
9100