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.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;

public class ProblemC {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		BufferedReader br = null;
		BufferedWriter bw = null;
		String input = null;
		StringBuffer output = null;
		String[] twonumbers = null;
		int min = 0, max = 0;
		ArrayList<String> list = null;
		String temp = null;
		String strmin = "";
		int tempint = 0;
		int counter = 0;
		int digit1 = 0, digit2 = 0;
		try {
			br = new BufferedReader(new FileReader(new File(
					"C:/Users/DHAVAL/Downloads/Input1.txt")));
			bw = new BufferedWriter(new FileWriter("output1.txt"));
			int count = Integer.parseInt(br.readLine());
			for (int i = 0; i < count; i++) {
				input = br.readLine();
				output = new StringBuffer("Case #" + (i + 1) + ": ");
				counter=0;
				// logic here
				list = new ArrayList<String>();
				twonumbers = input.split(" ");
				min = Integer.parseInt(twonumbers[0]);
				max = Integer.parseInt(twonumbers[1]);
				if (max >= 10) {
					for (int j = min; j <= max; j++) {
						strmin = "" + j;
						temp = strmin;
						for (int k = 0; k < strmin.length() - 1; k++) {
							temp = temp.substring(1) + temp.charAt(0);
							tempint = Integer.parseInt(temp);
							digit1 = ("" + tempint).length();
							digit2 = strmin.length();
							if (j < tempint && digit1 == digit2
									&& tempint >= min && tempint <= max
									&& !list.contains(strmin + "||" + temp)
									&& !temp.equals(strmin)) {
								//System.out.println(strmin + " " + tempint);
								// list.add(temp);
								list.add(strmin + "||" + temp);
								counter++;
							}
						}
					}
				}
				bw.write(output.toString() + counter);
				bw.newLine();
			}
			bw.close();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}
