I want to get the user input of 5 numbers then change that input into integers by splitting the string. But I keep on getting the error which says: Exception in thread "main" java.lang.NumberFormatException: For input string: "". Any clues on how to fix it?

```
public class Exercise{
 public static void main(String [] args){

  Scanner scan = new Scanner(System.in);
  System.out.println("Input Quizzes: ");
  Scanner scan = new Scanner(System.in);
  String quiz = scan.nextLine();
  String [] part = quiz.split(" ");
        int pq1 = Integer.parseInt(part[0]);
        int pq2 = Integer.parseInt(part[1]);
  System.out.println("Input Additionals: ");
  String quiz1 = scan.nextLine();
  String [] part1 = quiz1.split(" ");
        int pqa1 = Integer.parseInt(part1[0]);
        int pqa2 = Integer.parseInt(part1[1]);
  System.out.println("Input Recitation: ");
        int recitation = scan.nextInt();
  System.out.println("Input Seatworks: ");
        int swhw1 = scan.nextInt();
  System.out.println("Input Exercises ");
  String exp = scan.nextLine();
  String [] part2 = exp.split(" ");
            int ex1 = Integer.parseInt(part2[0]),
                ex2 = Integer.parseInt(part2[1]),
                ex3 = Integer.parseInt(part2[2]),
                ex4 = Integer.parseInt(part2[3]),
                ex5 = Integer.parseInt(part2[4]);
  }
 }

```