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.*;
import java.util.Scanner;

public class C {

public static void main(String[] args) throws FileNotFoundException, IOException {
     Scanner sc = new Scanner(new FileReader("input.txt"));
     PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));

        int noOfCases = sc.nextInt();

for (int caseNum = 0; caseNum < noOfCases; caseNum++){
	int A = sc.nextInt();
	int B = sc.nextInt();
	int result =0;
	
	if(A<10){
     pw.print("Case #" + (caseNum + 1) + ": 0");
	}
	else if(A<100){
		for (int i = A; i <= B; i++) {
			if(A<=shift2(i) && shift2(i)<=B  && i != shift2(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result/2);
	}
	else if(A<1000){
		for (int i = A; i <= B; i++) {
			if(A<=shift3(i) && shift3(i)<=B && i != shift3(i)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result);
	}
	
	if(caseNum < noOfCases-1)
     	pw.println("");
}
     

     pw.flush();
     pw.close();
     sc.close();
}

public static int shift3(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*100;
	return number;	
}

public static int shift2(int number){
	int r = number % 10;
	number = number/10;
	number = number + r*10;
	return number;	
}
}
