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.File;
import java.io.IOException;
import java.util.Scanner;


public class Recycle {

	
	public static void main (String[] args) {
		int s, t;
		Scanner scanner;
		
		try {
			scanner = new Scanner(new File("C:\\a.in"));
			if(scanner.hasNextLine()) {
				scanner.nextLine();
			}
			int testCase = 1;
			while(scanner.hasNextLine()) {
				String line = scanner.nextLine();
				Scanner iscn = new Scanner(line);
				s = iscn.nextInt();
				t = iscn.nextInt();
				iscn.close();
				
				int counter = 0;
				for(int i=s; i<=t; i++) {
					for(int j=s; j<i; j++) {
						if(isRecycled(i+"", j+"")) {
							counter++;
						}
					}
				}
				
				System.out.println("Case #"+testCase+": " +counter);
				testCase++;
			}
		} catch (IOException e) {
			System.err.println("could not open file");
		}
		
		
	}


	private static boolean isRecycled(String a, String b) {
		for(int i=1; i<a.length(); i++) {
			if(cycleBy(a, i).equals(b)) {
				return true;
			}
		}
		return false;
	}
	
	public static String cycleBy(String str, int places) {
		return str.substring(places) + str.substring(0, places);
	}
	
}
