import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
Scanner sc=new Scanner(System.in);
long dd[]=new long[10000];
int x=9;
long r = 0;
long su;
for(int i=0;x==9;i++){
su=sc.nextInt();
if(su!=0){
	dd[i]=su;
}
if(su==0){
	r=i;
	break;
}
}
for(int y=0;y<r;y++){
	int l=y+1;
	System.out.println("Case "+ l +": "+dd[y]);
}


	}

}
/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