using System;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var input = "'x,y',2,4,'y,z'";

        var parts = Regex.Matches(input, "'.*?'|[^,]+").Cast<Match>().Select(m => m.Value).ToList();

        Console.WriteLine(string.Join(Environment.NewLine, parts));

    }

}