03 camera view

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace _03CameraView
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] nums = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int skip = nums[0];
            int take = nums[1];

            string pattern = @"(?!\|)<(?<pics>[a-zA-Z]*)";
            string input = Console.ReadLine();
            MatchCollection matchedResult = Regex.Matches(input, pattern);
            List<string> res = new List<string>();
            foreach (Match m in matchedResult)
            {
                res.Add(m.Groups["pics"].Value);
            }
            List<string> result = new List<string>();
            for (int i = 0; i < res.Count; i++)
            {
                if (res[i].Length <= skip)
                {
                    continue;
                }
                else if (res[i].Length >= skip + take)
                {
                    result.Add(res[i].Substring(skip, take));
                }
                else
                {
                    result.Add(res[i].Remove(0, skip));
                }
            }
            Console.WriteLine(string.Join(", ", result));
        }
    }
}