import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

    private final static String SPACE = " ";
    
    public static void main(String[] args) {
        try {
            BufferedReader stdReader = 
                    new BufferedReader( new InputStreamReader(System.in));

            String sStr;
            int i=1;
            while ( (sStr  = stdReader.readLine()) != null) {
                int input=Integer.valueOf(sStr);
                if (input==0) {
                    // nothing to do..
                    break;
                } else {
                    System.out.println("Case" + SPACE + i + ":" + SPACE + input  );
                }
                ++i;
            }

            stdReader.close();
        } catch (Exception e) {
            System.exit(-1);
        } 
    }
}
/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