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.InputStreamReader;
import java.util.HashSet;
import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		Scanner inputFile = new Scanner(new InputStreamReader(System.in));
		String inputLine = null;
		String[] numberArray;
		int testCaseCount = 0;
		int startNumber = 0;
		int endNumber = 0;
		int recycledPairCount = 0;
		int digitCount = 0;
		StringBuilder recycleNumber = new StringBuilder();
		int newNumber = 0;
		String newNumberString;
		HashSet<String> recycleNumbers = new HashSet<String>();
		while (inputFile.hasNextLine()) {
			inputLine = inputFile.nextLine();
			numberArray = inputLine.split(" ");
			if(numberArray != null && numberArray.length == 1) {
				/*numberOfTestCases = Integer.parseInt(numberArray[0]);*/
			} else if (numberArray != null && numberArray.length == 2) {
				digitCount = numberArray[0].length();
				startNumber = Integer.parseInt(numberArray[0]);
				endNumber = Integer.parseInt(numberArray[1]);
				while(startNumber <= endNumber) {
					newNumberString = "" + startNumber;
					for(int i = 1; i < digitCount; i++) {
						recycleNumber = recycleNumber.append(newNumberString.substring(i) + newNumberString.substring(0, i));
						newNumber = Integer.parseInt(recycleNumber.toString());
						if(newNumber > startNumber && newNumber <= endNumber) {
							recycleNumbers.add(recycleNumber.toString());
						}
						recycleNumber.delete(0, digitCount);
					}
					recycledPairCount = recycledPairCount + recycleNumbers.size();
					startNumber++;
					recycleNumbers.clear();
				}
				System.out.println("Case #" + testCaseCount + ": " + recycledPairCount);
			}
			testCaseCount++;
			recycledPairCount = 0;
			startNumber = 0;
			endNumber = 0;
			digitCount = 0;
			newNumber = 0;
			recycleNumber.delete(0, digitCount);
		}
	}
}
