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.*;
public class Prob3
{
    public static void main (String[] args) throws IOException
    {
	BufferedReader in = new BufferedReader (new FileReader ("C-small-attempt0.in"));
	PrintWriter out = new PrintWriter (new FileWriter ("OUT3.txt"));
	int T = Integer.parseInt (in.readLine ().trim ()), c, a, b;
	StringTokenizer st;
	String temp, hold;
	ArrayList p;
	for (int x = 0 ; x < T ; x += 1)
	{
	    c = 0;
	    st = new StringTokenizer (in.readLine ());
	    a = Integer.parseInt (st.nextToken ());
	    b = Integer.parseInt (st.nextToken ());

	    for (int y = a ; y < b ; y += 1)
	    {
		if (y > 10)
		{
		    temp = Integer.toString (y);
		    p = new ArrayList ();
		    for (int z = 0 ; z < temp.length () - 1 ; z += 1)
		    {
			hold = temp.substring (z + 1) + temp.substring (0, z + 1);
			if (hold.charAt (0) != '0' && Integer.parseInt (hold) > Integer.parseInt (temp) && Integer.parseInt (hold) <= b && p.contains (hold) == false)
			{
			    c += 1;
			    p.add (hold);
			}
		    }
		}
	    }
	    out.println ("Case #" + (x + 1) + ": " + c);
	}
	out.close ();
    }
}


