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.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class RecycledNumbers {
	private static boolean isRecycled(long f,long s){

		String str1 = String.valueOf(f);
		String str2 = String.valueOf(s);
		
		if(str1.length()!=str2.length()){
			return false;
		}
		
		for(int i=1;i<str1.length();i++){
			String tmp = str1.substring(i)+str1.substring(0, i);
			if(tmp.equals(str2)){
				return true;
			}
		}
		
		return false;
	}
	
	public static void main(String[] args) {
			try{
				// Get the object of DataInputStream
				//DataInputStream in = new DataInputStream(System.in);
				BufferedReader br = new BufferedReader(new FileReader("C-small-attempt0.in"));
				FileWriter fstream = new FileWriter("out.txt");
				BufferedWriter out = new BufferedWriter(fstream);
				String strLine;
				
				strLine = br.readLine();
				int T = Integer.valueOf(strLine);
				for(int i=0;i<T;i++){
					long counter = 0;
					strLine = br.readLine();
					String[] list = strLine.split(" ");
					long A = Long.valueOf(list[0]);
					long B = Long.valueOf(list[1]);
					for(long j=A;j<=B;j++){
						for(long k=j+1;k<=B;k++){
							if(isRecycled(j,k)){
								counter++;
							}
						}
					}
										
					out.write("Case #"+(i+1)+": "+counter+"\n");
				}

				//Close the input stream
				br.close();
				out.close();
			}catch (Exception e){//Catch exception if any
				System.err.println("Error: " + e.getMessage());
				e.printStackTrace();
			}		

		}
}
