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String: 125. Valid Palindrome

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	`1`	`+// https://leetcode.com/problems/valid-palindrome/description/`
	`2`	`+/**`
	`3`	`+ * 125. Valid Palindrome`
	`4`	`+ * @param {string} s`
	`5`	`+ * @return {boolean}`
	`6`	`+ */`
	`7`	`+var isPalindrome = function(s) {`
	`8`	`+ s = s.toLowerCase().replace(/[^a-z]/g, '');`
	`9`	`+ let left = 0;`
	`10`	`+ let right = s.length - 1;`
	`11`	`+ while (left < right) {`
	`12`	`+ if (s[left] === s[right]) {`
	`13`	`+ left++;`
	`14`	`+ right--;`
	`15`	`+ } else {`
	`16`	`+ return false;`
	`17`	`+ }`
	`18`	`+ }`
	`19`	`+ return true;`
	`20`	`+};`

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