using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


class OddAndEvenProduct
{
    static void Main()
    {
        int odd = 1;
        int even = 1;
        string input = Console.ReadLine();
        string[] spaces = input.Split(' ');
        int[] array = new int[spaces.Length];
        for (int i =0; i < array.Length; i++)
        {
            array[i] = int.Parse(spaces[i]);
            if (i % 2 == 0)
            {
                odd *= array[i];
            }
            if (i % 2 == 1)
            {
                even *= array[i];
            }
        }
        if (even == odd)
        {
            Console.WriteLine("Yes");
            Console.WriteLine("product = {0}", odd);
        }
        else
        {
            Console.WriteLine("No");
            Console.WriteLine("odd_product = {0}", odd);
            Console.WriteLine("even_product = {0}", even);
        }

    }
}