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



class Progr
{
    const int MOD = 1000000007;
    const int INF = 1 << 30;

    static void Main(string[] args)
    {
        Solve();
    }

    static long GCD(long x, long y)
    {
        if (x == 0) return y;
        if (y == 0) return x;
        return GCD(y, x % y);
    }


    static long LCM(long x, long y)
    {
        return x * y / GCD(x, y);
    }

    static void Solve()
    {
        Scaner sc = new Scaner();
        write wr = new write();

        int N = sc.Int1;
        
        wr.wri("helloworld"+N.ToString());
    }
}





class Scaner
{
    public string Str => Console.ReadLine();

    public string[] StrArr => Str.Split(' ');

    public long[] LongArr => StrArr.Select(long.Parse).ToArray();
    public int[] IntArr => StrArr.Select(int.Parse).ToArray();
    public char[] CharArr => Str.ToArray();
    public long Long1 => LongArr[0];
    public int Int1 => IntArr[0];
    
}



class write
{
    public  void wri<T>(T x)
    {
        Console.WriteLine(x);
    }
}
