Java End-of-file

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    public class Solution {
    
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            int line = 0;
            while (sc.hasNext()){
                String input = sc.nextLine();
                line += 1;
                System.out.println(line+" "+input);
            }
            sc.close();
        }
    }