s, return true if it is a palindrome. s is lowercase and only contains alphanumeric characters.
s[i] to access a character at index i in string s.
verifyPalindrome("mom") → true
verifyPalindrome("racecar") → true
verifyPalindrome("raceacar") → false
😳 TIME LEFT: seconds 😳
function verifyPalindrome(s) {
}
⏰ TOTAL TIME: seconds ⏰