import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashSet;
import java.util.Set;

/**
 * 
 */

/**
 * @author antonio081014
 * @time: Apr 13, 2012, 5:01:31 PM
 */
public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {
        Main main = new Main();
        main.run();
        System.exit(0);
    }

    public void run() throws Exception {
        BufferedReader br = new BufferedReader(new FileReader("input.in"));
        BufferedWriter out = new BufferedWriter(new FileWriter("output.out"));
        int T = Integer.parseInt(br.readLine());
        for (int t = 1; t <= T; t++) {
            out.write("Case #" + Integer.toString(t) + ": ");
            String[] strs = br.readLine().split("\\s");
            int A = Integer.parseInt(strs[0]);
            int B = Integer.parseInt(strs[1]);

            Set<Integer> set;

            int count = 0;
            for (int n = A; n <= B; n++) {
                String tmp = Integer.toString(n);
                set = new HashSet<Integer>();
                for (int i = 0; i < tmp.length(); i++) {
                    String a = tmp.substring(i) + tmp.substring(0, i);
                    int m = Integer.parseInt(a);
                    if (m > n && m <= B) {
                        set.add(m);
                    }
                }
                count += set.size();
            }
            out.write(Integer.toString(count) + "\n");
        }
        out.close();
    }
}