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();
	}
}

package qualification_2012;

import java.io.File;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;

public class C {

	
	public void run() {
		try {
			Scanner in = new Scanner(new File("C.in"));
			PrintWriter out = new PrintWriter(new File("C.txt"));
			
			int T = in.nextInt();
			for (int TC = 1; TC <= T; TC++) {
				int A = in.nextInt();
				int B = in.nextInt();
				long counter = 0;
				HashSet<String> set = new HashSet<String>();
				for (int n = A; n < B; n++) {
					for (int i = 10; i < n; i*=10) {
						String p1 = (n/i) + "";
						p1 = (n%i) + p1;
						int m = Integer.parseInt(p1);
						String t = n+"-"+m;
						if (m > n && m <= B && !set.contains(t)) {
							set.add(t);
							counter++;
						}
					}
				}
				
				System.out.println("Case #" + TC + ": " + counter);
				out.println("Case #" + TC + ": " + counter);
			}
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) {
		new C().run();
	}
}
