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;
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package googlecodejamqualifier;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;

/**
 *
 * @author Dean
 */
public class RecycledNumbers {

    public static void main(String args[]) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int testCases = Integer.parseInt(reader.readLine().trim());
        for (int i = 0; i < testCases; i++) {
            String split[] = reader.readLine().split("[\\s]+");
            int A = Integer.parseInt(split[0]);
            int B = Integer.parseInt(split[1]);
            System.out.println("Case #" + (i + 1) + ": " + countPermutations(A, B));
        }
    }

    public static int countPermutations(int A, int B) {
        int count = 0;

        int digits = (B + "").length();
        for (int m = A + 1; m <= B; m++) {
            HashMap<Integer, Boolean> checked = new HashMap<Integer, Boolean>(10);
            for (int i = 1; i < digits; i++) {
                int mul = (int) (Math.pow(10, i));
                int move = m % mul;
                int n = m / mul;
                n = n + move * (int) (Math.pow(10, (digits - i)));
                if ((n < m) && ((n + "").length() == digits)&& (A <= n)) {
                    //count++;
                    if (checked.containsKey(n)) {
                        continue;
                    } else {
                        count++;
                        checked.put(n, true);
                    }
                }
            }
        }
        return count;
    }
}
