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();
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
//c prob 
import java.io.*;
import java.util.StringTokenizer;

/**
 *
 * @author abood
 */
public class test {
  static  int count =0,s=0;
    public static void main(String[] args) throws IOException {
        BufferedReader br =new BufferedReader(new FileReader("C-small-attempt0.in"));
   PrintWriter out =new PrintWriter(new BufferedWriter(new FileWriter("C-small-attempt0.out")));
        int loop=Integer.parseInt(br.readLine());
        for (int i = 1; i <=loop; i++) {
            count=0;
            StringTokenizer st=new StringTokenizer(br.readLine());
           int x=Integer.parseInt(st.nextToken());
           int y=Integer.parseInt(st.nextToken());
            for (int j = x; j < y; j++) {
                check(j,y);
            }
      out.println("Case #"+i+": "+count);
        }
        out.close();                                  // close the output file
    System.exit(0);  
    }
    public static void check(int xx,int yy){
        String res="";
        String x=""+xx;
        int l=x.length();
        String t="";
        for (int i = 1; i < l; i++) {
            t=x.substring(i, l)+x.substring(0,i);
            int m=Integer.parseInt(t);
            if(m<=yy&&m>xx){
               // System.out.println(xx+" "+t);
                if(res.contains(t))continue;
                res+=" "+t;
                count++;
                }
            
        }
    }
}
