import java.util.Scanner;

/**
 * MakeAnagram
 */
public class MakeAnagram {

  // Anagran is 2 words compose of the sames letters such LISTEN and SILENT, MUG
  // and GUM, RATE and TEAR etc...

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.print("Please enter the first String here: " + "\t");
    String str1 = sc.nextLine();
    System.out.print("Please enter the second String here: " + "\t");
    String str2 = sc.nextLine();
    sc.close();

    System.out.println(DeletionCount(str1, str2));

  }

  private static int DeletionCount(String strOne, String strTwo) {
    int deletionCount = 0;

    int[] Freqency = new int[26];
    strOne = strOne.toLowerCase();
    strTwo = strTwo.toLowerCase();

    // fill the frequency for strOne chars
    for (int i = 0; i < strOne.length(); i++) {
      Freqency[strOne.charAt(i) - 'a']++;
    }

    // fill the frequency for strTwo chars
    for (int i = 0; i < strTwo.length(); i++) {
      Freqency[strTwo.charAt(i) - 'a']--;
    }

    // to calculate the deletion count we are going to do the absolute addition of
    // the strOne and strTwo

    for (int x : Freqency) {
      deletionCount += Math.abs(x);
    }

    return deletionCount;
  }
}