import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t=sc.nextInt();
		int casos=1, a, b, n, m, cont;
		while(t!=0){
			a=sc.nextInt();
			b=sc.nextInt();
			if(a>b){
				int aux=a;
				a=b;
				b=aux;
			}
			System.out.printf("Case #%d: ",casos++);
			if(a==b){
				System.out.printf("%d\n",0);
			}else{
				cont=0;
				for(n=a;n<b;n++){					
					for(m=n+1;m<=b;m++){					
						if(isRecycled(n,m)) cont++;
					}
				}
				System.out.printf("%d\n",cont);
			}
			t--;
		}		
	}
	public static boolean isRecycled(int n1, int n2){
		String s1, s2, aux;
		s1 =  String.valueOf( n1 );
		s2 =  String.valueOf( n2 );		
		boolean r = false;		
		for(int i=0;i<s1.length();i++){
			aux="";
			aux=s1.substring(i,s1.length())+s1.substring(0,i);
//			System.out.println(aux);
			if(aux.equals(s2)){
				r=true;
				break;
			}
		}		
		return r;
	}
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class C {
	public static void main(String[] args) throws Exception {

		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(in.readLine());

		ExecutorService es = Executors.newFixedThreadPool(Math.min(8, n));
		@SuppressWarnings("unchecked")
		Future<Integer>[] fs = new Future[n];

		for (int i = 0; i < n; i++) {
			String[] parts = in.readLine().split(" ");
			final int A = Integer.parseInt(parts[0]);
			final int B = Integer.parseInt(parts[1]);

			fs[i] = es.submit(new Callable<Integer>() {
				public Integer call() {
					return wastetime(A, B);
				}
			});

		}
		for (int i = 0; i < n; i++) {
			System.out.println("Case #" + (i + 1) + ": " + fs[i].get());
		}
		es.shutdown();

	}

	public static int wastetime(int A, int B) {
		HashSet<Long> answers = new HashSet<Long>();
		int len = (int) Math.log10(A) + 1;
		int m;
		int div = (int) Math.pow(10, len - 1);
		if (div <= 0) {
			return 0;
		}

		for (int n = A; n < B; n++) {
			m = n;
			for (int i = 0; i < len; i++) {
				m = ((m % div) * 10) + m / div;
				if (m > n && m <= B) {
					long ans = ((n & 0xFFFFFFFFl) << 32) + m;
					//System.out.println(Long.toHexString(ans));
					answers.add(ans);
				}
			}
		}
		return answers.size();//

		// return div;
	}
}