You are given a 0-indexed string array words, where words[i] consists of lowercase English letters.
In one operation, select any index i such that 0 < i < words.length and words[i - 1] and words[i] are anagrams, and delete words[i] from words. Keep performing this operation as long as you can select an index that satisfies the conditions.
Return words after performing all operations. It can be shown that selecting the indices for each operation in any arbitrary order will lead to the same result.
An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase using all the original letters exactly once. For example, "dacb" is an anagram of "abdc".
\n
Example 1:
\n\n\nInput: words = ["abba","baba","bbaa","cd","cd"]\nOutput: ["abba","cd"]\nExplanation:\nOne of the ways we can obtain the resultant array is by using the following operations:\n- Since words[2] = "bbaa" and words[1] = "baba" are anagrams, we choose index 2 and delete words[2].\n Now words = ["abba","baba","cd","cd"].\n- Since words[1] = "baba" and words[0] = "abba" are anagrams, we choose index 1 and delete words[1].\n Now words = ["abba","cd","cd"].\n- Since words[2] = "cd" and words[1] = "cd" are anagrams, we choose index 2 and delete words[2].\n Now words = ["abba","cd"].\nWe can no longer perform any operations, so ["abba","cd"] is the final answer.\n\n
Example 2:
\n\n\nInput: words = ["a","b","c","d","e"]\nOutput: ["a","b","c","d","e"]\nExplanation:\nNo two adjacent strings in words are anagrams of each other, so no operations are performed.\n\n
\n
Constraints:
\n\n1 <= words.length <= 1001 <= words[i].length <= 10words[i] consists of lowercase English letters.给你一个下标从 0 开始的字符串 words ，其中 words[i] 由小写英文字符组成。
在一步操作中，需要选出任一下标 i ，从 words 中 删除 words[i] 。其中下标 i 需要同时满足下述两个条件：
0 < i < words.lengthwords[i - 1] 和 words[i] 是 字母异位词 。只要可以选出满足条件的下标，就一直执行这个操作。
\n\n在执行所有操作后，返回 words 。可以证明，按任意顺序为每步操作选择下标都会得到相同的结果。
字母异位词 是由重新排列源单词的字母得到的一个新单词，所有源单词中的字母通常恰好只用一次。例如，\"dacb\" 是 \"abdc\" 的一个字母异位词。
\n\n
示例 1：
\n\n输入：words = [\"abba\",\"baba\",\"bbaa\",\"cd\",\"cd\"]\n输出：[\"abba\",\"cd\"]\n解释：\n获取结果数组的方法之一是执行下述步骤：\n- 由于 words[2] = \"bbaa\" 和 words[1] = \"baba\" 是字母异位词，选择下标 2 并删除 words[2] 。\n 现在 words = [\"abba\",\"baba\",\"cd\",\"cd\"] 。\n- 由于 words[1] = \"baba\" 和 words[0] = \"abba\" 是字母异位词，选择下标 1 并删除 words[1] 。\n 现在 words = [\"abba\",\"cd\",\"cd\"] 。\n- 由于 words[2] = \"cd\" 和 words[1] = \"cd\" 是字母异位词，选择下标 2 并删除 words[2] 。\n 现在 words = [\"abba\",\"cd\"] 。\n无法再执行任何操作，所以 [\"abba\",\"cd\"] 是最终答案。\n\n
示例 2：
\n\n输入：words = [\"a\",\"b\",\"c\",\"d\",\"e\"]\n输出：[\"a\",\"b\",\"c\",\"d\",\"e\"]\n解释：\nwords 中不存在互为字母异位词的两个相邻字符串，所以无需执行任何操作。\n\n
\n\n
提示：
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