示例 1：
输入：text = "alice is a good girl she is a good student", first = "a", second = "good"输出：["girl","student"]
示例 2：
输入：text = "we will we will rock you", first = "we", second = "will"输出：["we","rock"]
来源：力扣（LeetCode）链接：https://leetcode-cn.com/problems/occurrences-after-bigram著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。

class Solution {    public String[] findOcurrences(String text, String first, String second) {        List<String> ansList = new ArrayList<>();        String[] textArr = text.split(" ");
        for (int i = 2; i < textArr.length; i++) {            if (textArr[i - 2].equals(first) && textArr[i - 1].equals(second)) {                ansList.add(textArr[i]);            }        }
        int size = ansList.size();        String[] ans = new String[size];        for (int j = 0; j < size; j++) {            ans[j] = ansList.get(j);        }
        return ans;    }}

    return ansList.toArray(new String[ansList.size()]);