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 RecycledNumbers
{
    public static void main(String args[]) throws Exception
    {
        Scanner in = new Scanner(new File("C-small-attempt0.in"));
        int t = Integer.parseInt(in.nextLine());
        for(int x = 1; x <= t; x++)
        {
            String st = in.nextLine();
            int a, b;
            a = Integer.parseInt(st.split(" ")[0]);
            b = Integer.parseInt(st.split(" ")[1]);
            int y = 0;
            if(a >= 10)
            {
                for(int i = a; i < b; i++)
                {
                    int n, m;
                    n = i;
                    String tmp = "" + n;
                    for(m = (n + 1); m <= b; m++)
                    {
                        for(int j = 1; j < tmp.length(); j++)
                        {
                            int tt = getNew(n, j);
                            if(tt == m && ("" + tt).length() == ("" + m).length() && a <= n && n < m && m <= b)
                            y++;
                        }
                    }
                }
            }
            System.out.println("Case #" + x + ": " + y);
        }
    }
    public static int getNew(int n, int a)
    {
        String s = "" + n;
        int  p = s.length() - a;
        String s2 = s.substring(p);
        String s3 = s.substring(0, p);
        s = s2 + s3;
        return Integer.parseInt(s);
    }
}