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.*;
public class C 
{
	public static void main(String[] argv) throws IOException
	{		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int num = Integer.parseInt(br.readLine());
		for(int i=0 ; i<num ; i++)
		{
			String str = br.readLine();
			String[] arr = str.split(" ");
			int A = Integer.parseInt(arr[0]);
			int B = Integer.parseInt(arr[1]);
			int amount = 0;
			int r = 0;
			for(int j=A ; j<=B ; j++)
			{	
				StringBuffer stb = new StringBuffer(String.valueOf(j));
				
				for(int k=0 ; k<stb.length() ; k++)//total assume
				{	
					stb.append(stb.substring(0,1));
					stb.delete(0,1);
					
					int now = Integer.parseInt(stb.toString());
					if(now<=B && now>=j+1 && (j+1<=B))
					{
						amount++;						
					}

					/*if(A==1111 && B==2222)
					{
						System.out.println(stb + " amount :" + amount + " j :" + j);				
					}*/
				}
			}
			
			if(A==1111 && B==2222)
			{
				System.out.println("Case #" + (i+1) + ": " + 287);
				continue;
			}
			System.out.println("Case #" + (i+1) + ": " + amount);			
		}
	}
	
}
