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.util.regex.*;
import java.text.*;
import java.math.*;
import java.io.*;

public class RecycledNumbers {

	private final static String FILE_IN = RecycledNumbers.class.getSimpleName() + ".in";			
	private final static String FILE_OUT = RecycledNumbers.class.getSimpleName() + ".out";			
	
	public static void main(String[] args) throws Exception {
		final Scanner in = new Scanner(new File(FILE_IN));
		final PrintWriter out = new PrintWriter(FILE_OUT);
		final int testCnt = in.nextInt();
		for (int caseNum = 1; caseNum <= testCnt; ++ caseNum){
			final int a = in.nextInt();
			final int b = in.nextInt();			
			final int last [] = new int [b + 1];
			int result = 0;
			for (int i = a; i <= b; ++ i){
				final String s = String.valueOf(i);			
				for (int pos = 1; pos < s.length(); ++ pos){
					final String newNum = s.substring(pos) + s.substring(0, pos);
					final int newInt = Integer.valueOf(newNum);
					if (newInt > i && newInt <= b){
						if (last[newInt] != i){
							++ result;
							last[newInt] = i;
						}
					}
				}
			}
			out.println(String.format("Case #%d: %d", caseNum, result));
		}
		in.close();
		out.close();
	}

}
