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

public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int idx = 1;
		String str;

		StringBuilder output = new StringBuilder();
		try {

			while(true){
				str = br.readLine();
				if (str.equals("0")) {
					break;
				} else {
					output.append("Case ").append(String.valueOf(idx))
							.append(": ").append(str).append("\n");
				}
				if (idx % 100 == 0) {
					System.out.print(output.toString());
					output.setLength(0);
				}
				idx++;
			}
			if (output.length() > 0) {
				System.out.print(output.toString());
			}

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
/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