LR8

using System;

namespace Drafty
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] source = Console.ReadLine().Split(" ", StringSplitOptions.RemoveEmptyEntries);

            if (source.Length == 1)
            {
                Console.WriteLine(0);
                return;
            }

            if (source.Length == 0)
            {
                Console.WriteLine("Входных данных не обнаружено");
                return;
            }

            int min = source[0].Length, minNom = 0;

            for (int i = 1; i < source.Length; i++)
            {
                if (source[i].Length < min)
                {
                    min = source[i].Length;
                    minNom = i;
                }
            }

            Console.WriteLine(source[minNom]);
        }
    }
}