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.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;


public class RecycledNumbers {
	
	public static void main(String []args) throws IOException{
		BufferedReader reader = new BufferedReader(new FileReader(new File("C-small-attempt0.in")));
		BufferedWriter writer = new BufferedWriter(new FileWriter(new File("out")));
		int T = Integer.parseInt(reader.readLine());
		
		for(int i = 0;i<T;i++){
			HashSet<ValuePairs> set = new HashSet<ValuePairs>();
			
			String[] limits = reader.readLine().split(" ");
			int A = Integer.parseInt(limits[0]);
			int B = Integer.parseInt(limits[1]);
	
			for(int j = A;j<B;j++){
				LinkedList<Character> list = new LinkedList<Character>();
				String num = ""+j;
				for(int k = 0;k<num.length();k++){
					list.add(num.charAt(k));
				}
				for(int k = 1;k<num.length();k++){
					Collections.rotate(list, 1);
					String temp = "";
					for(int m = 0; m < num.length(); m++){
						temp += list.get(m);
					}
					int result = Integer.parseInt(temp);
					if(result>j&&result<=B){
						set.add(new ValuePairs(j,result));
						System.out.println(j+" "+result+"\n");
					}
				}
			}
			
			writer.write("Case #"+(i+1)+": "+set.size()+"\n");
			writer.flush();
		}
	}

}
