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));
			
		}
		
		
		

	}
	
	
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package question3;

/**
 *
 * @author karim
 */
public class Pair {

    private Integer int1;
    private Integer int2;

    public Pair() {
    }

    public Pair(int int1) {
        this.int1 = int1;
    }

    public Pair(int int1, int int2) {
        this.int1 = int1;
        this.int2 = int2;
    }

    public int getint1() {
        return int1;
    }

    public void setint1(int int1) {
        this.int1 = int1;
    }

    public int getint2() {
        return int2;
    }

    public void setint2(int int2) {
        this.int2 = int2;
    }

    @Override
    public boolean equals(Object obj) {
        Pair o = (Pair) obj;
        if ((o.int1.equals(int1) && o.int2.equals(int2)) || (o.int2.equals(int1) && o.int1.equals(
                int2))) {
            return true;
        } else {
            return false;
        }

    }

    @Override
    public int hashCode() {

        return int1.hashCode() + int2.hashCode();
    }
}
