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.*;
import java.util.*;
class Replace
{
	public static void main(String args[])throws Exception
	{
		//Scanner sc = new Scanner(System.in);
		// PrintWriter pw = new PrintWriter(System.out);
		Scanner sc = new Scanner(new FileReader("C-small-attempt1.in"));
		//Console console=System.console(new FileReader("B-small-practice-1.in"));
		PrintWriter pw = new PrintWriter(new FileWriter("C-small-attempt1.out"));
		int ntest = sc.nextInt();
		//int a=100;
		//int b=500;
		
		for(int k=1;k<=ntest;k++)
		{
		int sum=0;
		int count=0;
		//int a=Integer.parseInt(sc.next());
		//int b=Integer.parseInt(sc.next());
		int a=sc.nextInt();
		int b=sc.nextInt();
		
		for(int i=a;i<=b;i++)
		{
				if(i>0 && i<100)
				{
					int rem=i%10;
					sum=rem*10+i/10;
					if(sum==i)
					{
					}
					else if(sum>=a && sum<=b)
					{
						count++;
						System.out.println(i);
						//System.out.println("garg");
					}
				}
				if(i>=100 && i<1000)
				{
					int rem=i%100;
					sum=rem*10+i/100;
					//System.out.println(i);
					
					if(sum==i)
					{
					}
					else if (sum>=a && sum<=b)
					{
						count++;
						//System.out.println(i);
					}
					//System.out.println("lucky");
					rem=i%10;
					sum=rem*100+i/10;
					if(sum==i)
					{
					}
					else if(sum>=a && sum<=b)
					{
						count++;
						//System.out.println(i);
						//System.out.println("garg");
					}
				}
					
					
				
		}
		pw.print("Case #" + k + ": ");
		pw.print(count/2);
		pw.println();
		}
		pw.close();
		sc.close();
	}
}