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

public class Test {

	public void doMain() throws Exception{
		Scanner input = new Scanner(new FileReader("./iothings/C-small-attempt0.in"));
		PrintWriter pw = new PrintWriter(new FileWriter("./iothings/output.txt"));
        int n = input.nextInt();
        for(int i = 0 ; i < n ; i++){
            int A = input.nextInt();
            int B = input.nextInt();
            boolean[] ispaired = new boolean[B+1];
            pw.println("Case #"+(i+1)+": "+num(A,B,ispaired));
        }
		input.close();
		pw.flush();
		pw.close();
	}
	    	
    public static int num(int A,int B,boolean[] ispaired){
    	int count = 0;
    	for(int i = A ; i <= B ; i++){
    		StringBuilder sb = new StringBuilder(i+"");
    		boolean same = false;
    		ispaired[i] = true;
    		while(!same){
    			sb.append(sb.charAt(0));
    			sb.deleteCharAt(0);
    			if(Integer.parseInt(sb.toString()) == i){
    				same = true;
    			}else if(A <= Integer.parseInt(sb.toString()) && Integer.parseInt(sb.toString()) <= B && sb.charAt(0) != '0' && !ispaired[Integer.parseInt(sb.toString())]){
    				count++;
    			}
    		}
    	}
    	return count;
    }
	
	public static void main(String[] args) throws Exception{
		(new Test()).doMain();
	}	
	
	
}
