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.*;

class MyReader{
    private BufferedReader reader = null;
    private StringTokenizer tokenizer = null;
    MyReader(Reader r) throws IOException{
        reader = new BufferedReader(r);
    }
    public int nextInt() throws IOException {
        return Integer.parseInt(nextToken());
    }
    public long nextLong() throws IOException{
        return Long.parseLong(nextToken());
    }
    public double nextDouble() throws IOException{
        return Double.parseDouble(nextToken());
    }
    public String nextLine() throws IOException{
        return reader.readLine();
    }
    public String nextToken() throws IOException {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(reader.readLine());
        }
        return tokenizer.nextToken();
    }
}


public class Temp {
    public static boolean cycled(int n, int m){
        String s = String.valueOf(m);
        for (int i = 0; i < s.length(); ++i){
            String str = s.substring(i) + s.substring(0,i);
            int k = Integer.valueOf(str);
            if (n==k) return true;                  
        }
        return false;
    }
    public static void main(String[] args) throws IOException {
        MyReader reader = new MyReader(new InputStreamReader(System.in));
        PrintWriter writer = new PrintWriter("C.out");
        int t = reader.nextInt();
        for (int tt = 0; tt < t; ++tt){
            int a = reader.nextInt();
            int b = reader.nextInt();
            int ans=0;
            Set<Integer> set = new HashSet<Integer>();
            for (int i=a; i<=b; ++i)
                for (int j=i+1; j<=b; ++j)
                    if (cycled(i,j)) { set.add(j); ans++; }
            writer.println("Case #" + (tt + 1) + ": " + ans);
        }
        writer.close();
    }
}
