import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.util.Scanner;


public class Recycle {
	public static void main(String args[])
	{		
		int t;
		int save[] = new int[50];
		Scanner kb = new Scanner(System.in);
		t = kb.nextInt();
		int a,b;
		for(int i=0;i<t;i++)
		{
			a = kb.nextInt();
			b = kb.nextInt();
			int change = 0;
			int count = 0;
			System.out.print("Case #"+(i+1)+": ");
			
			for(int j=a;j<=b;j++)
			{
				
				String s = Integer.toString(j); 
				int x=0;
				for(int start=1;start<s.length();start++)
				{
					int max=0;
					change = 0;
					for(int k=start-1;max<s.length();max++,k--)
					{
						if(k<0) k = s.length()-1;
						change = change + (s.charAt(k)-'0')*((int)Math.pow(10,max));
						if(max==s.length()-1)
						{
							save[x++] = change;
						}
						
					}
					if(change<=b && change>=a && change!=j && change>j) 
					{
						int point=0;
						for(int y=0;y<x-1;y++)
						{
							if(save[y]==change) 
							{
								point=1;
								break;
							}
						}
						if(point==0)
						{	
							count++;
						}
					}
				}
			}
			System.out.println(count);
		}
		
	}
}
