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 recycledNumbers;

import java.io.*;
import java.util.*;
public class Entry {

	private static ArrayList<Integer> cases=new ArrayList<Integer>();
	
	public static void main(String args[]) throws IOException
	{
		FileReader src=new FileReader("test.txt");
		FileWriter f=new FileWriter("output.txt");
		BufferedWriter out=new BufferedWriter(f);
		Scanner in=new Scanner(src);
		int iterate=in.nextInt();
		int i,j;
		int A,B;
		int n,m;
		
		HashSet<Double> dub=new HashSet<Double>();
		for(i=0;i<iterate;i++)
		{
			A=in.nextInt();
			B=in.nextInt();
			n=A;
			while(n< B)
			{
				for(j=1;j<Integer.toString(n).length();j++)
				{
					m=reverse(n,j);
					if((A<=n)&& (n<m) &&(m<=B) &&(m!=n))
					{
						dub.add((n*Math.pow(10,Integer.toString(n).length()))+m);
					}
				}
				n++;
			}
			cases.add(dub.size());
			dub.clear();
			
		}
		
		int index=1;
		for(int str:cases)
		{
			out.write(("Case #"+index+":\t"+str));
			out.write("\n");
			index++;
		}
		out.close();
		in.close();
	}
	
   
	private static int reverse(int n,int j)
	{
		String str=Integer.toString(n);
		String ans=str.substring(str.length()-j);
		String ans2=str.substring(0,str.length()-j);
		str=ans+ans2;
		int m=Integer.valueOf(str);
		return m;
	}
	
}
