botanics

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

namespace Q10340
{
    class Program
    {
        static private string[] sarr; static private char[] par = { ' ' }; static private bool tof;
        static void Main(string[] args)
        {
            for (; ; )
            {
            label: Console.Write("string>>>");
                sarr = Console.ReadLine().Split(par, StringSplitOptions.RemoveEmptyEntries);
                if (sarr.Length != 2) goto label;
                tof = false;
                if (sarr[0].Length > sarr[1].Length) Console.WriteLine("No");
                else if (sarr[0].Length == sarr[1].Length)
                    Console.WriteLine(sarr[0] == sarr[1] ? "Yes" : "No");
                else
                {
                    for (int i = 0; i < sarr[0].Length; i++)
                    {
                        if (sarr[1].IndexOf(sarr[0].Substring(i, 1)) != -1)
                        {
                            sarr[1] = sarr[1].Substring(sarr[1].IndexOf(sarr[0].Substring(i, 1)) + 1);
                            tof = true;
                        }
                        else
                        {
                            tof = false; break;
                        }
                    }
                    Console.WriteLine(tof ? "Yes" : "No");
                }
            }
        }
    }
}