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.IOException;
import java.util.HashSet;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws IOException {
		Scanner scanner = new Scanner(new File("c:\\eclipse\\3\\C-small-attempt0.in"));
		int numTc = scanner.nextInt();
		for (int index = 0; index < numTc; index++) {
			int result = 0;
			int a = scanner.nextInt();
			int b = scanner.nextInt();
			for (int i = a; i <= b; i++) {
				if (i < 10) continue;
				int num = findNumPairs(i, a, b);
				result += num;
			}
			System.out.println("Case #" + (index + 1) + ": " + result/2);
		}
	}
	private static int findNumPairs(int num, int a, int b) {
		
		char[] origStr = String.valueOf(num).toCharArray();
		int len = origStr.length;
		char[] newStr = new char[len];
		int result = 0;
		int startIndex = 1;
		HashSet<Integer> consumedSet = new HashSet<Integer>();
		do {
			if (startIndex == len) {
				break;
			}
 			int idx = 0;
			for (int i = startIndex; i < len; i++) {
				newStr[idx++] = origStr[i];
			}
			for (int i = 0; i < startIndex; i++) {
				newStr[idx++] = origStr[i];
			}
			startIndex++;
			int newNum = Integer.parseInt(String.valueOf(newStr));
			if (newNum < a || newNum > b || newNum == num || consumedSet.contains(newNum)) {
				continue;
			}
			result++;
			consumedSet.add(newNum);
		} while(true);
		return result;
	}
}