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;
import java.io.*;

public class Displayer
{
    public static void main(String[] args) throws IOException
    {
        Scanner kb = new Scanner(new File("/Users/mbp13/Documents/Google Code Jam/GCJ_Q3/src/input"));
        PrintStream out = new PrintStream(new File("/Users/mbp13/Documents/Google Code Jam/GCJ_Q3/src/output_q3"));
        int testNum,A,B;
        String tmpStr,tmpStr2,cut1,cut2;
        int cnt,x;
        testNum = kb.nextInt();
        for(int i=0;i<testNum;i++)
        {
            A = kb.nextInt();
            B = kb.nextInt();
            cnt = 0;
            for(int j=A;j<=B;j++)
            {
                tmpStr = j+"";
                for(int k=1;k<tmpStr.length();k++)
                {
                    cut1 = tmpStr.substring(0,k);
                    cut2 = tmpStr.substring(k,tmpStr.length());
                    tmpStr2 = cut2 + cut1;
                    x = Integer.parseInt(tmpStr2);
                    if(x > j && x >= A && x <= B)
                    {
                        cnt++;
                        System.out.println(j + " " + tmpStr2);
                    }
                }
            }
            out.println("Case #"+(i+1)+": "+cnt);
        }
    }
}
