public class Main {
	public static void main(String[] args) {
		java.util.Scanner sc = new java.util.Scanner(System.in);
		int l = 0;
                int[] a = new int[l];
		int[] b = new int[l];

		do {
			int x = sc.nextInt();
			if (x == 0) {
				break;
			}
			l++;
			a = new int[l];
			for (int i = 0; i < l - 1; i++) {
				a[i] = b[i];
			}
			a[l - 1] = x;
			b = new int[l];
			for (int i = 0; i < l; i++) {
				b[i] = a[i];
			}
		} while (true);

		for (int i = 0;i < b.length;i++) {
			System.out.println("Case " + (i+1) + ": " + b[i]);
		}
	}
}
/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