ctci-making-anagrams

//https://www.hackerrank.com/challenges/ctci-making-anagrams

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution {

    static void Main(String[] args) {
        string a = Console.ReadLine();
        string b = Console.ReadLine();

        int aSize = a.Length;
        int bSize = b.Length;

        //a = 97, z = 122
        int[] abcFirst = new int[26];
        int[] abcSecond = new int[26];
        //a -> 0, z -> 25
        //x-97
        for(int i = 0; i < 26; i++){
            abcFirst[i] = 0;
            abcSecond[i] = 0;
        }
        for(int i = 0; i < aSize; i++){
            abcFirst[a[i]-97]++;
        }

        for(int i = 0; i < bSize; i++){
            abcSecond[b[i]-97]++;
        }

        int deletedNumbers = 0;
        for(int i = 0; i < 26; i++){
            if((abcFirst[i] - abcSecond[i]) != 0){
                deletedNumbers += Math.Abs(abcFirst[i] - abcSecond[i]);
            }
        }
        Console.WriteLine(deletedNumbers);
    }
}