Messaging_Lists_MoreEx

package feb20_Lists_MoreExercises;

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

public class Messaging {
    public static void main(String[] args) {
        @SuppressWarnings("resource")

        Scanner sc = new Scanner(System.in);

        List<Integer> numbers = Arrays.stream(sc.nextLine().split("\\s+")).map(Integer::parseInt)
                .collect(Collectors.toList());

        String text = sc.nextLine();

        String output = "";

        int count = 0;

        while (!numbers.isEmpty()) {
            StringBuilder sb = new StringBuilder(text);
            int sumDigits = 0;
            int number = numbers.get(0);
            while (number > 0) {
                int lastDigit = number % 10;
                sumDigits += lastDigit;
                number /= 10;
            }

            char letter = ' ';
            for (int j = 0; j < text.length(); j++) {
                if (sumDigits > text.length()) {
                    sumDigits -= text.length();
                }
                letter = text.charAt(sumDigits + count);
            }

            sb.deleteCharAt(sumDigits);
            output += letter;
            count++;
            numbers.remove(number);
        }

        System.out.println(output);

    }
}