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.*;
import java.util.*;


class ProblemC
{



  public static void main(String[] args) throws IOException
  {
	FileReader fr = new FileReader(args[0]);
	BufferedReader br = new BufferedReader(fr);
	String[] splittArray;
	int[] points;
	int A,B,res;
	int T = Integer.parseInt(br.readLine());
	//System.out.println(T);

	String dummy;
	String result="";
	for(int i=1;i<=T;i++) {
		dummy=br.readLine();
		splittArray=dummy.split(" ");
		A=Integer.parseInt(splittArray[0]);
		B=Integer.parseInt(splittArray[1]);
		res=0;
		for(int j=A;j<B;j++) {
			
			res+=permutes(j,new Integer(j).toString(),B);
		}
		
		result+="Case #"+i+": "+res;
		if(i<T) result+="\r\n";
	}
	br.close();





	FileWriter writer;
  	File file;
  
	     file = new File(args[1]);
     try {
      
       writer = new FileWriter(file ,true);
       
       // Text wird in den Stream geschrieben
      
       writer.write(result);
       
       
       // Schreibt den Stream in die Datei
       // Sollte immer am Ende ausgefÃ¼hrt werden, sodass der Stream 
       // leer ist und alles in der Datei steht.
       writer.flush();
       
       // SchlieÃt den Stream
       writer.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
	
  }

public static int permutes(int b,String a,int c) {
	LinkedList<Integer> result=new LinkedList<Integer>();
	String dummy;
	int dummy2;

	for(int i=1;i<=a.length()-1;i++) {
		dummy=a.substring(i,a.length())+a.substring(0,i);
		dummy2=Integer.parseInt(dummy);
		if(dummy2>b && dummy2<=c && !result.contains(dummy2)) result.add(dummy2);
	}

	return result.size();
}
	

}

