using System.Text.RegularExpressions;
using System.Collections.Generic;
public static void Main()
var text = "845-002400-342A (INST 35)";
string[] digits = text.Replace("INST", "").Split('(', ')').Where(x => !string.IsNullOrEmpty(x)).ToArray();
foreach (var d in digits)
Console.WriteLine(d +"z");