using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		Regex rx = new Regex(@"^(\d{5})\s*([a-zA-Z].+)(?=\b\d+,)(\d+).*Tel.\s([\d ]+)$",
        RegexOptions.Compiled);

        string text = "83661 Lenggries Marktstr. 14, Tel. 08042 91860";

        MatchCollection matches = rx.Matches(text);
		
		for (int count = 0; count < matches.Count; count++)  
			Console.WriteLine(matches[count].Value);  
    }
}