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.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class C {

	public static void main(String[] args) throws Exception{
		new C().solve(args[0]);
	}

	private void solve(String file) throws Exception {
		Scanner s = new Scanner(new File(file));
		int x=s.nextInt();
		for(int i=1;i<=x;i++) {
			int y = calculate(s.nextInt(),s.nextInt());			
			System.out.format("Case #%d: %d\n",i,y);
		}
			
	}

	private int calculate(int a, int b) throws Exception {
		int r = 0;
		for ( int w=a; w<=b ; w++) {
			String A = Integer.toString(w);
			int l = A.length();
			List<Integer> list=new ArrayList<Integer>();
			for(int i=0;i<l;i++) {
				A=A.substring(1)+A.charAt(0);
				int bb = Integer.parseInt(A);
				if ( bb==w ) continue;
				if ( bb<=w ) continue;
				if ( bb>b  ) continue;
				if ( list.contains(bb))continue;
				list.add(bb);
				r++;
			}
		}
		return r;
	}
}
