Occurrences After Bigram
<p>Given two strings <code>first</code> and <code>second</code>, consider occurrences in some text of the form <code>&quot;first second third&quot;</code>, where <code>second</code> comes immediately after <code>first</code>, and <code>third</code> comes immediately after <code>second</code>.</p>

<p>Return <em>an array of all the words</em> <code>third</code> <em>for each occurrence of</em> <code>&quot;first second third&quot;</code>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre><strong>Input:</strong> text = "alice is a good girl she is a good student", first = "a", second = "good"
<strong>Output:</strong> ["girl","student"]
</pre><p><strong class="example">Example 2:</strong></p>
<pre><strong>Input:</strong> text = "we will we will rock you", first = "we", second = "will"
<strong>Output:</strong> ["we","rock"]
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= text.length &lt;= 1000</code></li>
	<li><code>text</code> consists of lowercase English letters and spaces.</li>
	<li>All the words in <code>text</code> are separated by <strong>a single space</strong>.</li>
	<li><code>1 &lt;= first.length, second.length &lt;= 10</code></li>
	<li><code>first</code> and <code>second</code> consist of lowercase English letters.</li>
	<li><code>text</code> will not have any leading or trailing spaces.</li>
</ul>
String
class Solution:
    def findOcurrences(self, text: str, first: str, second: str) -> List[str]:
        words = text.split()
        ans = []
        for i in range(len(words) - 2):
            a, b, c = words[i : i + 3]
            if a == first and b == second:
                ans.append(c)
        return ans
