Palindrome index - 14 lines of code

PalindromeIndex2.cs

using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        int T = int.Parse(Console.ReadLine());
        for(int t = 0; t < T; t++)
        {
            string test = Console.ReadLine();
            Console.WriteLine(FindIndex(test, 0, test.Length-1));
        }
    }
    
    static int FindIndex(string test, int s, int e)
    {
        int i =s, j= e;
        while(i < j)
        {
            if(test[i] != test[j])
            {
                // which one to remove?
                return FindIndex(test, i+1, j) == -1 ? i : j;
            }
            i++;j--;
        }
        
        return -1;
    }
}