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.util.*;
public class C {
    public static String shift(String a, int d) {
        String end = a.substring(d, a.length());
        String start = a.substring(0, d);
        return end + start;
    }
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int t = s.nextInt();
        for (int ca = 0; ca < t; ca++) {
            long ct = 0;
            int A = s.nextInt(), B = s.nextInt();
            for (int a = A; a <= B; a++) {
                String astr = ""+a;
                HashSet<String> seen = new HashSet<String>();
                for (int l = 1; l < astr.length(); l++) {
                    String shift = shift(astr, l);
                    
                    int c = Integer.parseInt(shift);
                    if (!seen.contains(shift) && a < c && c <= B) {
                        seen.add(shift);
                        ct++;
                    }
                }
            }
            System.out.printf("Case #%d: %d\n",ca+1,ct);
        }
	}
}
