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.
 */
package problem3;

import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

/**
 *
 * @author lhideg
 */
public class Problem3 {

    private static String fileName = Problem3.class.getSimpleName().replaceFirst("_.*", "");
    private static String inputFileName = fileName + ".in";
    private static String outputFileName = fileName + ".out";
    private static Scanner in;
    private static PrintWriter out;

    private int solve() {
        Map<String, Integer> solutionMap = new HashMap<String, Integer>();
        int result = 0;

        String nStr = in.next();
        String mStr = in.next();

        Integer n = Integer.valueOf(nStr);
        Integer m = Integer.valueOf(mStr);
        Set<Integer> watchedSet = new HashSet<Integer>();
        Set<String> valueSet = new HashSet<String>();
        if (nStr.length() != 1) {
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                watchedSet.add(i);

                String watchStr = str;

                for (int j = 0; j < str.length() - 1; j++) {
                    watchStr = watchStr.substring(1) + watchStr.charAt(0);
                    if (watchStr.charAt(0) == '0') {
                        continue;
                    }
                    Integer watchInt = Integer.valueOf(watchStr);
                    watchedSet.add(watchInt);
                    if (watchInt > i && watchInt <= m && watchInt > i) {
                        valueSet.add(str+watchStr);
                        valueSet.add(watchStr+str);
                    }
                }
            }
        }
        return valueSet.size()/2;
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        Locale.setDefault(Locale.US);
        if (args.length >= 2) {
            inputFileName = args[0];
            outputFileName = args[1];
        }
        in = new Scanner(new FileReader(inputFileName));
        out = new PrintWriter(outputFileName);
        int tests = in.nextInt();
        in.nextLine();
        for (int t = 1; t <= tests; t++) {
            System.out.println("#" + t);
            out.print("Case #" + t + ": ");
            out.print(new Problem3().solve() + "\n");
        }
        in.close();
        out.close();

    }
}
