import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;


public class RecycledNumbers {
	static int caso=0;	
	static int valor=0;
	static String output="";
	static String thisline="";
	static String filesalida="/home/rik/filenumbers.txt";
	static String n1;
	static String n2;
	
	public static void analize(String[] numbers){
		n1=numbers[0];
		n2=numbers[1];	
		valor=0;
		for(int x=Integer.parseInt(n1);x<=Integer.parseInt(n2);x++){
				runString(String.valueOf(x));		
		}	
		caso++;
		output+="Case #"+caso+": "+valor+"\n";
	}	
	
	public static void runString(String num){	
		for(int x=1;x<num.length();x++){
			String inic=num.substring(0, x);
			String from=num.substring(x, num.length());			
			if(Integer.parseInt(from+inic)>Integer.parseInt(num)){
				if(Integer.parseInt(inic+from)>=Integer.parseInt(n1)&&Integer.parseInt(inic+from)<=Integer.parseInt(n2)&&Integer.parseInt(from+inic)>=Integer.parseInt(n1)&&Integer.parseInt(from+inic)<=Integer.parseInt(n2)){
					valor++;
				}else{
					continue;
				}
			}			
		}		
	}
	
	public static void readFile(String filename){
		BufferedReader entrada;
		BufferedWriter salida;
		try {
		entrada = new BufferedReader(new FileReader(filename));
		entrada.readLine();
		while(entrada.ready()){
			String[] numbers;
			numbers=entrada.readLine().split(" ");
			analize(numbers);			
		}
		}catch (Exception e){
			e.printStackTrace();
		}
		System.out.println(output);
		try {
			salida= new BufferedWriter(new FileWriter(filesalida));
			salida.write(output);
			 try {
	                if (salida != null) {
	                    salida.flush();
	                    salida.close();
	                }
			 } catch (IOException ex) {
	                ex.printStackTrace();
	            }  
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	public static void main (String args[]){
		System.out.print("file path: ");
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));	
		   try {
			   	 String userinput;
		         userinput = br.readLine();
		         readFile(userinput);
		      } catch (IOException ioe) {
		         System.out.println("IO error");
		         System.exit(1);
		      }   
		
	}	
}
