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.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;

public class C {

	int INF = 1 << 28;

	void run() {
		Scanner sc;
		FileOutputStream fw;
		try {
			sc = new Scanner(new File("C.in"));
			fw = new FileOutputStream(new File("C.out"));
			PrintWriter pw = new PrintWriter(fw);
//			sc.useDelimiter("\\n");
			int n = sc.nextInt();
			for(int i=1;i<=n;i++) {
				int a = sc.nextInt();
				int b = sc.nextInt();
				int cnt = 0;
				for(int j=a;j<=b;j++) {
					String num = String.valueOf(j);
//					debug(num);
					HashSet<Integer> visited = new HashSet<Integer>();
					for(int k=1;k<num.length();k++) {
						String rot_s = num.substring(k) + num.substring(0,k);
						int rot = Integer.parseInt( rot_s );
						if(rot > j && a <= rot &&  rot <= b) visited.add(rot);
					}
					cnt += visited.size();
				}
//				debug(cnt);
				pw.println("Case #" + i + ": " + cnt);
			}
			pw.close();
			fw.close();
		} catch (FileNotFoundException e) {
			// TODO èªåçæããã catch ãã­ãã¯
			e.printStackTrace();
		} catch (IOException e) {
			// TODO èªåçæããã catch ãã­ãã¯
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		new C().run();
	}

	void debug(Object... os) {
		System.err.println(Arrays.deepToString(os));
	}
}
