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.taskA;

import java.util.HashMap;
import java.util.Map;

import Parser.MyReader;
import Parser.MyWriter;

public class Main {
	public static void main(String[] args) {
		MyReader myReader = new MyReader(
				"/Users/shami13/Downloads/A-small-attempt0.in");
		MyWriter myWriter = new MyWriter("/Users/shami13/Downloads/A-small-attempt0.out");
		
		Map<Character, Character> dictionary = createDictionary();

		int taskLength = Integer.parseInt(myReader.read());

		
		for (int i = 1; i <= taskLength; i++) {
			String taskString = myReader.read();
			Task task = new Task(dictionary);
			String result = task.execute(taskString);
			myWriter.writeString("Case #" + i + ": " + result);
			System.out.println("Case #" + i + ": " + result);
		}
		myWriter.close();
	}

	private static Map<Character, Character> createDictionary() {
		Map<Character, Character> result = new HashMap<Character, Character>();
		result.put('q', 'z');
		result.put('z', 'q');
		
		
		String[] originals = { "ejp mysljylc kd kxveddknmc re jsicpdrysi",
				"rbcpc ypc rtcsra dkh wyfrepkym veddknkmkrkcd",
				"de kr kd eoya kw aej tysr re ujdr lkgc jv" };

		String[] results = { "our language is impossible to understand",
				"there are twenty six factorial possibilities",
				"so it is okay if you want to just give up" };
	
		for(int i = 0; i < originals.length; i++){
			for(int p = 0; p < originals[i].length(); p++){
				if (!result.containsKey(originals[i].charAt(p))){
					result.put(originals[i].charAt(p), results[i].charAt(p));
				}
			}
		}
		
		return result;
	}
}
