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.*;
import java.io.*;

public class QR_Csmall {
	public static void main(String[] args) throws Exception{
		// Scanner sc = new Scanner(System.in);
		// PrintWriter pw = new PrintWriter(System.out);
		// Scanner sc = new Scanner(new FileReader("input.in"));
		// PrintWriter pw = new PrintWriter(new FileWriter("output.out"));
		Scanner sc = new Scanner(new FileReader("C-small-attempt0.in"));
		PrintWriter pw = new PrintWriter(new FileWriter("C-small-attempt0.out"));
		
		
		int T;
		int A, B;
		int n, m;
		int ncnt;
		int cnt;
		int[] check = new int[3];
		boolean ok;
		
		T = sc.nextInt();
		
		
		for(int times = 1; times <= T; times++){
			A = sc.nextInt();
			B = sc.nextInt();
			cnt = 0;
			
			
			for(int i = A; i < B; i++){
				n = i;
				m = 0;
				ncnt = 0;
				for(int k = 0; k < check.length; k++){
					check[k] = -1;
				}
				
				while(n > 0){
					n /= 10;
					ncnt++;
				}
				
				for(int j = 1; j < ncnt; j++){
					ok = true;
					m = 0;
					m = (i / (int)Math.pow(10, j)) + ((i % (int)Math.pow(10, j)) * (int)Math.pow(10, ncnt-j));
					if(i < m && m <= B){
						check[j - 1] = m;
						for(int l = 0; l < j - 1; l++){
							if(check[l] == m){
								ok = false;
								break;
							}
						}
						if(ok) cnt++;
						
					}
					
				}
				
			}
			
			
			System.out.print("Case #" + times + ": ");
			System.out.print(cnt);
			System.out.println();
			
			
			pw.print("Case #" + times + ": ");
			pw.print(cnt);
			pw.println();
			
		}
		
		sc.close();
		pw.close();
		
	}
}

