import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;

// Recycled Numbers
// https://code.google.com/codejam/contest/1460488/dashboard#s=p2

public class C {

	private static String process(Scanner in) {
		int A = in.nextInt();
		int B = in.nextInt();
		int res = 0;
		int len = Integer.toString(A).length();
		for(int n = A; n < B; n++) {
			String str = Integer.toString(n);
			TreeSet<Integer> set = new TreeSet<Integer>();
			for(int i = 1; i < len; i++) {
				int m = Integer.parseInt(str.substring(i, len) + str.substring(0, i));
				if ( m > n && m <= B && ! set.contains(m) ) {
					set.add(m);
					res++;
				}
			}
		}
		return Integer.toString(res);
	}

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in.available() > 0 ? System.in : 
			new FileInputStream(Thread.currentThread().getStackTrace()[1].getClassName() + ".practice.in"));
		int T = in.nextInt();
		for(int i = 1; i <= T; i++) 
			System.out.format("Case #%d: %s\n", i, process(in));
	}
}


import java.io.*;

public class pro3 {

private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

public static void main ( String [] args ) throws IOException
{
int N = Integer.parseInt(br.readLine());

for(int i = 0;i < N; i++)
System.out.println("Case #" + (i+1) + ": " + cal());
}

private static String cal() throws IOException {
	int start;
	int end;
	int lenth;
	int count=0;
	
	String[] buffer = br.readLine().split("\\s");
	
	start=Integer.parseInt(buffer[0]);
	end=Integer.parseInt(buffer[1]);
	
	lenth=Integer.toString(start).length();
	
	String digit= new String();
	String tempdigit=new String();
	
	for(int i=start;i<=end;i++){
		digit=Integer.toString(i);
		
		
		for(int j=1;j<lenth;j++){
			tempdigit=digit.substring(j).concat(digit.substring(0,j));
			if(Integer.parseInt(tempdigit)<=end
			   && Integer.parseInt(tempdigit)>=start){
				if(digit.compareTo(tempdigit)==0)
					break;
				/*System.out.println("digit "+digit);
				System.out.println("tempdigit"+tempdigit);
				*/count++;
			}
		}
			
		}
		

	
	

return Integer.toString(count/2);
}

}