import java.util.*;

public class Main {

    public static void main(String[] arg) {
        try {
            Scanner scan = new Scanner(System.in);
            int i = 1;
            while (scan.hasNext()) {
                int x = scan.nextInt();
                if (i > 10000) {
                    break;
                }
                if (0 < x && x < 10001) {
                    System.out.println("Case " + i + ": " + x);
                    i++;
                }
            }
        } catch (InputMismatchException ex) {
            System.out.println("??´??°?????\?????????????????????");
        }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz