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.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class C {

	public static void main(String[] args) {
		int n = 10;
		int m = 30;
		String line;
		String filename1 = "C-small-attempt0.in";
		String filename2 = "outC.out";
		BufferedReader input;
		BufferedWriter output;
		int counter = 0;
		int poruSkaicius = 0;
		try {
			input = new BufferedReader(new FileReader(filename1));
			output = new BufferedWriter(new FileWriter(filename2));
			while ((line = input.readLine()) != null) {
				if (counter == 0) {
				} else {
					n = Integer.parseInt(line.split("\\s")[0]);
					m = Integer.parseInt(line.split("\\s")[1]);
					output.write("Case #" + counter + ": ");
					//
					for (int i = n; i < m; i++) {
						for (int j = i; j <= m; j++) {
							poruSkaicius += skaiciuok(i, j);
						}
					}
					//
					output.write(poruSkaicius+"\n");
//					System.out.println(poruSkaicius);
					poruSkaicius=0;
				}
				counter++;
			}
			input.close();
			output.close();
		} catch (IOException e1) {
			System.exit(1);
		}

	}

	public static int skaiciuok(int pirmas, int antras) {
		//		System.out.println(pirmas+":"+antras);
		//		System.out.println(("" + pirmas).length());
		char[] temp = (pirmas + "").toCharArray();
		int counter = 0;
		for (int i = 0; i < ("" + pirmas).length()-1; i++) {
			//			System.out.print(temp);
			//			System.out.print("|");
			char tempChar = temp[temp.length -1];
			for (int j = temp.length - 1; j > 0; j--) {
				temp[j] = temp[j - 1];
			}
			temp[0] = tempChar;
			String tempString = new String(temp);
			//			System.out.println(tempString);
			if (tempString.equals(antras + "") && !tempString.equals(pirmas + "")) {
//				System.out.println(tempString+"/" + pirmas);
				counter++;
				break;
			}
		}
		//		System.out.print(counter);
		return counter;
	}
}
