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();
	}
}

package fr.lcwi.googlecodejam;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

/**
 * For Google Code Jam 2012
 */
public class ProblemC {

    private static Scanner scanner;
    private static int nbCases;

    public static void main(String[] args) throws IOException {
        String filename = args[0];
        scanner = new Scanner(ProblemC.class.getClassLoader().getResourceAsStream(filename + ".in"));

        nbCases = Integer.valueOf(scanner.nextLine());

        BufferedWriter bWriter = null;
        try {
            bWriter = new BufferedWriter(new FileWriter(filename + ".out"));
            for (int i = 1; i <= nbCases; i++) {
                resolveCase(i, bWriter);
            }
        } finally {
            if (bWriter != null) {
                bWriter.close();
            }
        }
    }

    private static void resolveCase(int caseNb, BufferedWriter bWriter) throws IOException {
        int A = scanner.nextInt();
        int B = scanner.nextInt();

        int result = 0;

        for (int n = A; n < B; n++) {
            Set<Integer> ms = new HashSet<Integer>();
            int length = (int) Math.floor(Math.log10(n)) + 1;

            if (length > 1) {
                for (int i = 0; i < length - 1; i++) {
                    int puissanceA = (int) Math.pow(10, length - i - 1);
                    int puissanceB = (int) Math.pow(10, i + 1);
                    int digitsToMove = n % puissanceB;
                    int ma = digitsToMove * puissanceA;
                    if (ma >= puissanceB) {
                        int mb = n / puissanceB;
                        int m = ma + mb;
                        if (n < m && m < B+1 && !ms.contains(m)) {
                            result++;
                            ms.add(m);
                        }
                    }
                }
            }
        }

        bWriter.write("Case #" + caseNb + ": " + result);
        if (caseNb < nbCases) {
            bWriter.newLine();
        }
    }
}
