package qual;

import java.util.Scanner;

public class RecycledNumbers {

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

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.*;
import java.util.*;


public class RecycledNumbers {

	public static void main(String[] args) throws FileNotFoundException {
		Scanner sc = new Scanner(new File("input"));
		int n=sc.nextInt();
		for (int i = 1; i <= n; i++) {
			int N=sc.nextInt();
			int M=sc.nextInt();			
			Set<String> set=new HashSet<String>();
			for(int j=N;j<=M;j++) {
				String currentNumber=String.valueOf(j);
				if(currentNumber.length()==1) {
					continue;
				}				
				for(int k=1;k<currentNumber.length();k++){					
					StringBuilder newNumber=new StringBuilder();
					newNumber.append(currentNumber.substring(k)).append(currentNumber.substring(0, k));
					int num1=Integer.parseInt(newNumber.toString());
					if(currentNumber.length()!=String.valueOf(num1).length()){
						continue;
					}					
					if(j!=num1 && num1>=N && num1<=M) {
						set.add(Math.min(j,num1)+":"+Math.max(j,num1));
					}
				}
			}
			System.out.println("Case #" + i + ": "+set.size());
		}
		

	}

}
