O1. Messaging / Lists - More Exercise

package ListsMoreExercise;

import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class O1Messaging {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<Integer> numbers = Arrays.stream(scanner.nextLine().split("\\s+"))
                .map(Integer::parseInt)
                .collect(Collectors.toList());

        String inputText = scanner.nextLine();
        StringBuilder message = new StringBuilder();

        for (int i = 0; i < inputText.length(); i++) {
            message.append(inputText.charAt(i));
        }
        for (int number : numbers) {
            int sum = 0;
            while (number > 0) {
                int digit = number % 10;
                sum += digit;
                number /= 10;
            }
            if (sum > message.length() - 1) {
                sum -= message.length();
            }

            System.out.print(message.charAt(sum));
            message.deleteCharAt(sum);
        }
    }
}