import java.io.*;
import java.util.*;


public class H {
	static BufferedReader input;
	static StringTokenizer _stk;
	static String readln() throws IOException {
		String l = input.readLine();
		if(l!=null) _stk = new StringTokenizer(l, " ");
		return l;
	}
	static String next() { return _stk.nextToken(); }
	static int nextInt() { return Integer.parseInt(next()); }

	public static void main(String[] args) throws IOException {
		Locale.setDefault(Locale.US);
		File asd = new File("book.in");
		input = new BufferedReader(new FileReader(asd));
		String lineaActual;
		int casos=0;
		lineaActual = readln();
		while(true){
			casos++;
			int inicial=nextInt();
			int end=nextInt();
			if(inicial>end){
				int tmp=end;
				end=inicial;
				inicial=tmp;
			}
			String numeros="";
			for(;inicial<=end;inicial++){
				numeros+=inicial;
			}
			int arreglo[] = new int[10];
			for(int i=0;i<numeros.length();i++){
				arreglo[((int)numeros.charAt(i))-48]++;
			}
			System.out.print("Case "+casos+": ");
			for(int i=0;i<arreglo.length;i++){
				System.out.print(i+":"+arreglo[i]);
				if(i!=arreglo.length-1) System.out.print(" ");
			}
			lineaActual = readln();
			if(lineaActual.equals("0")) return;
			else System.out.println();
		}
	}
}