class Solution {    public boolean validPalindrome(String s) {        int start = 0, end = s.length() - 1;        boolean found = false;        while (start < end) {            if (s.charAt(start) != s.charAt(end)) {                return isPal(s, start, end - 1) || isPal(s, start + 1, end);            }            start++;            end--;        }        return true;    }        private boolean isPal(String s, int start, int end) {        while (start < end) {            if (s.charAt(start) != s.charAt(end)) {                return false;            }            start++;            end--;        }        return true;    }}