import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.util.Scanner;
class recycled{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int t,i,n,m,a,b,o,f=0,c=0,ca=1;
t=s.nextInt();
for(i=1;i<=t;i++)
{
a=s.nextInt();
b=s.nextInt();
for(n=a;n<b;n++)
{
String str=Integer.toString(n);
int l=str.length();
f=rep(str,l,b);
if(f==1)
c--;
for(o=l-1;o>0;o--)
{
m=Integer.parseInt(str.substring(o)+str.substring(0,o));
if(m>n && m>a && m<=b)
{
c++;
}
}
f=0;
}
System.out.println("Case #"+ca+": "+c);
c=0;
ca++;
}
}
private static int rep(String str,int l,int b)
{
int i,f=0;
if(l%2==0 && l>3 && (int)(str.charAt(0))<(int)(str.charAt(1)) && Integer.parseInt(str.charAt(l-1)+str.substring(0,l-1))<=b)
{
for(i=2;i<l;i++)
{
if(str.charAt(i)==str.charAt(i-2))
f=1;
else 
return 0;
}
}
return f; 
}
}