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.BufferedReader;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.HashSet;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author bgamlath
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        // TODO code application logic here
        Integer.parseInt("00001");
        BufferedReader in = new BufferedReader(new FileReader("input.txt"));
        PrintStream out = new PrintStream("output.txt");
        int n = Integer.parseInt(in.readLine());
        for(int i = 1; i<=n; i++){
            out.println("Case #" + i + ": " + getRes(in.readLine()));
        }
    }
    static int getRes(String str){
        String[] m = str.split(" ");
        int a = Integer.parseInt(m[0]);
        int b = Integer.parseInt(m[1]);
        int res = 0;
        for(int i = a; i<=b; i++){
            res += count(i, b);
        }
        return res;
    }

    static int count(int i, int b){
        HashSet<Integer> k = new HashSet<Integer>();
        String s = i + "";
        int len = s.length();
        int t = i;
        for(int  j = 1; j< len; j++){
            k.add(Integer.parseInt((s.substring(j) + s.substring(0,j))));
        }
        int res = 0;
        for(int j: k){
            if((j+"").length()==len && j>i && j<=b)
                res++;
        }
        return res;
        
    }
}
