Java End-of-file

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    import java.util.Scanner;
    
    public class Solution {
    
        public static void main(String[] args) {
            Scanner scan = new Scanner(System.in);
            
            int i = 1;
            while (scan.hasNextLine()) {
                System.out.printf("%d %s\n", i++, scan.nextLine());
            }
            
            scan.close();
        }
    }