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.*;
class Replace
{
	public static void main(String args[])throws Exception
	{
		//Scanner sc = new Scanner(System.in);
		// PrintWriter pw = new PrintWriter(System.out);
		Scanner sc = new Scanner(new FileReader("C-small-attempt3.in"));
		//Console console=System.console(new FileReader("B-small-practice-1.in"));
		PrintWriter pw = new PrintWriter(new FileWriter("C-small-attempt3.out"));
		int ntest = sc.nextInt();
		//int a=100;
		//int b=500;
		
		for(int k=1;k<=ntest;k++)
		{
		int sum=0;
		int count=0;
		//int a=Integer.parseInt(sc.next());
		//int b=Integer.parseInt(sc.next());
		int a=sc.nextInt();
		int b=sc.nextInt();
		
		for(int i=a;i<=b;i++)
		{
				if(i>0 && i<100)
				{
					int rem=i%10;
					sum=rem*10+i/10;
					if(sum==i)
					{
					}
					else if(sum>=a && sum<=b)
					{
						count++;
						System.out.println(i);
						//System.out.println("garg");
					}
				}
				if(i>=100 && i<1000)
				{
					int rem=i%100;
					sum=rem*10+i/100;
					//System.out.println(i);
					
					if(sum==i)
					{
					}
					else if (sum>=a && sum<=b)
					{
						count++;
						//System.out.println(i);
					}
					//System.out.println("lucky");
					rem=i%10;
					sum=rem*100+i/10;
					if(sum==i)
					{
					}
					else if(sum>=a && sum<=b)
					{
						count++;
						//System.out.println(i);
						//System.out.println("garg");
					}
				}
					
					
				
		}
		pw.print("Case #" + k + ": ");
		pw.print(count/2);
		pw.println();
		}
		pw.close();
		sc.close();
	}
}