import java.io.*;

class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		int i=1;
		while(true){
        	String x=br.readLine();
        	if(x.equals("0")) break;
        	sb.append("Case "+i+": "+x+"\n");
        	if(i%100==0){
        		System.out.print(sb.toString());
        		sb.setLength(0);
        	}
    		i++;
        }
		System.out.print(sb.toString());
	}
}
/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