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();
	}
}


/**
 * Shashank Gupta
 * 
 * ****SinnerShanky****
 */
import java.io.*;
public class problem_C
{
    void main()
    {
        try
        {
           FileReader fr=new FileReader("C:\\USERS\\SHASHANK GUPTA\\DOWNLOADS\\C-small-attempt0.in");
           BufferedReader br=new BufferedReader(fr);
           int n=Integer.parseInt(br.readLine());
           for(int i=1;i<=n;i++)
           {
               int count=0;
               String s=br.readLine();
               int b=0;
               int a=0;
               for(int j=0;j<s.length();j++)
                 {
                   if(s.charAt(j)==' ')
                   {
                     a=Integer.parseInt(s.substring(0,j));
                     b=Integer.parseInt(s.substring(j+1,s.length()));
                     j=s.length();
                   }
                  }
                  for(int j=a;j<b;j++)
                  {
                      for(int k=j+1;k<=b;k++)
                      {
                          String temp=Integer.toString(j);
                          if(check(temp,k)==true)
                          count++;
                        }
                  }
                  System.out.println("Case #"+i+": "+count);
           }
            fr.close();
        }
        catch(Exception e)
        {
            System.err.println(e);
        }
    }
    boolean check(String s, int b)
    {
        String s1="";
        for(int i=s.length()-1;i>=0;i--)
        {
            s1=s.substring(0,i);
            s1=s.substring(i)+s1;
            int a=Integer.parseInt(s1);
            if(a==b)
            return true;
        }
        return false;
    }
        
}
