﻿using System;
using System.Linq;


namespace _06.OddNumbersAtOddPositions_Vol._2
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] nums = Console.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse).ToArray();

            for (int i = 1; i <= nums.Length - 1; i += 2)
            {
                if (nums[i] % 2 != 0)
                {
                    Console.WriteLine($"Index {i} -> {nums[i]}");
                }                
            }
        }
    }
}
