TextBombardment

using System;
using System.Collections.Generic;
using System.Linq;

class TextBombardment
{
    static void Main()
    {
        string input = Console.ReadLine();
        int cols = int.Parse(Console.ReadLine());
        string bombs = Console.ReadLine();

        int rows = input.Length / cols + 1;

        List<char> charList = input.ToList();
        for (int i = 0; i < cols; i++)
        {
            charList.Add(' ');
        }
        char[] charArr = charList.ToArray();
        int[] bombsArr = bombs.Split(' ').Select(int.Parse).ToArray();

        for (int i = 0; i < bombsArr.Length; i++)
        {
            charArr[bombsArr[i]] = ' ';
            bombsArr[i] += cols;
        }

        for (int j = 0; j < rows - 1; j++)
        {
            for (int i = 0; i < bombsArr.Length; i++)
            {
                if (charArr[bombsArr[i]] != ' ')
                {
                    charArr[bombsArr[i]] = ' ';
                    if (bombsArr[i] + cols <= charArr.Length)
                    {
                        bombsArr[i] += cols;
                    }
                }
            }
        }

        Console.WriteLine(new string(charArr).Trim());
    }
}