Sum of Vowels SoftUni

import java.util.Scanner;

public class VowelsSum {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String word = scanner.nextLine();

        int sum = 0;

        for (int i = 0; i < word.length(); i++) {
            char letter = word.charAt(i);
            switch (letter) {
                case 'a':
                    sum += 1;
                    break;
                case 'e':
                    sum +=2;
                    break;
                case 'i':
                    sum +=3;
                    break;
                case 'o':
                    sum +=4;
                    break;
                case 'u':
                    sum +=5;
                    break;
            }
        }

        System.out.println(sum);
    }
}