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 package03;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

public class RecycledNumbers {
	
	private static void checkInputFile(String filePath) throws IOException{
		BufferedReader br=new BufferedReader(new FileReader(new File(filePath)));
		PrintWriter output=new PrintWriter(filePath.concat(".out"));
		
		String str=new String();
		int row=0;
		
		while((str=br.readLine())!=null){
			if(row!=0){
				int as=checkOneline(str);
				output.println("Case #"+row+": "+as);
			}
			row=row+1;
		}
		output.close();
		br.close();
	}
	
	private static int checkOneline(String str) {
		int as=0;
		int minNumb=0;
		int maxNumb=0;
		
		//å°ä¸è¡æ°å­çå­ç¬¦ä¸²è½¬ä¸ºæ´åList;
		List<Integer> iLst=getIntLstFromString(str);
		
		minNumb=iLst.get(0);
		maxNumb=iLst.get(1)+1;
		
		for(int a=minNumb;a<maxNumb+1;a++){
			String tst=String.valueOf(a);
			Set<Integer> is=new HashSet<Integer>();
			for(int i=1;i<tst.length();i++){
				String str1=tst.substring(0, i);
				String str2=tst.substring(i);
				int a1=Integer.valueOf(str2.concat(str1));
				is.add(a1);
			}
			for(Iterator<Integer> it=is.iterator();it.hasNext();){
				int a1=it.next();
				if(a1>a && a1<maxNumb){
					as=as+1;
				}
			}
		}
		
		return as;
	}

	private static List<Integer> getIntLstFromString(String str){
		//å°ä¸è¡æ°å­çå­ç¬¦ä¸²è½¬ä¸ºæ´åList;
			List<Integer> iLst=new ArrayList<Integer>();
			int j=0;
			for(int i=0;i<str.length();i++){
				if(str.substring(i, i+1).equals(" ")){
					iLst.add(Integer.valueOf(str.substring(j, i)));
					j=i+1;
				}
			}
			iLst.add(Integer.valueOf(str.substring(j, str.length())));
			return iLst;
	}
	public static void main(String args[]) throws IOException{
		Scanner scanner=new Scanner(System.in);
		String inputFilePath=scanner.nextLine();
		checkInputFile(inputFilePath);
	}
}
