using System;
namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbers = Console.ReadLine().Split(' ');
            var findTheOdd = new int[numbers.Length];
            for (int i = 0; i < numbers.Length; i++)
            {
                findTheOdd[i] = int.Parse(numbers[i]);
            }
            int oddCounter = 0;
            for (int i = 0; i < findTheOdd.Length; i++)
            {
                if ((findTheOdd[i] % 2 == 1) && (i % 2 == 1) || (findTheOdd[i] % 2 == -1) && (i % 2 == 1))
                {
                    oddCounter++;
                    Console.WriteLine($"Index {i} -> {findTheOdd[i]}");
                } else
                {

                }                
            }            
        }
    }
}