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.*;

public class C {
	public static void main (String [] args) {
				
		Scanner s = new Scanner(System.in);
		int T = s.nextInt();
		int[] old = new int[7];
        
        
		for (int t = 1; t <= T; t++) {
			int A = s.nextInt();
            int B = s.nextInt();
			int ans = 0;
            
            for (int n = A; n < B; n++) {
                int time = 0;
                int d = 10;
                while (n >= d) {
                    time++;
                    d *= 10;
                }
                
                int oldSize = 0;
                for (int i = 0; i < time; i++) {
                    int m = movingFront(n, i, time - i);                    
                    if (m > n && m <= B) {
                        boolean unique = true;
                        for (int k = 0; k < oldSize; k++) {
                            if (old[k] == m) {
                                unique = false;
                                break;
                            }
                        }
                        if (unique) {
                            ans++;
                            old[oldSize++] = m;
                        }
                    }
                    
                }
            }
            
			System.out.println("Case #" + t + ": "+ans);
		}
	}
    
    public static int movingFront(int n, int index, int postMult) {
        int front = 0;
        int mult = 1;
        while (index-- >= 0) {
            front += ((n % 10) * mult);
            n /= 10;
            mult *= 10;
        }
        int frontMult = 1;
        while (postMult-- > 0) {
            frontMult *= 10;
        }
        return (front * frontMult) + n;
    }
}