using System;

public class Program

{

    public static void Test(Func<string,string> f) {

        Console.WriteLine( f(@".") );

        Console.WriteLine( f(@" .") );

        Console.WriteLine( f(@"/") );

        Console.WriteLine( f(@"\") );

        Console.WriteLine( f(@"/\") );

        Console.WriteLine( f(@"\/") );

    }

    public static void Main()

    {

        Test(s=>{

            var c=s[s.Length-1];

            return c < '/'

                ? " "+s

                : c > '/'

                    ? s+"/"

                    : s+"\\";

        });

        //s=>{var c=s[s.Length-1];return c<'/'?" "+s:c>'/'?s+"/":s+"\\";}

    }

}