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 code.jam;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

public class Main {

	public static void main(String[] args) {
		int T;
		try {
			BufferedReader in = new BufferedReader(new FileReader("C-small-attempt0.in"));
			PrintWriter out = new PrintWriter(new BufferedWriter(
					new FileWriter("out")));
			String strLine;
			String outLine;
			strLine = in.readLine();
			T = Integer.valueOf(strLine);
			for (int i = 0; i < T; i++) {
				strLine = in.readLine();
				String result = "";
				String[] stringArray = strLine.split(" ");
				// char[] charArray = strLine.toCharArray();
				int A = Integer.valueOf(stringArray[0]);
				int B = Integer.valueOf(stringArray[1]);
				int count = 0;
				for (int j = A; j <= B; j++) {
					for (int k = j+1; k <= B; k++) {
						if(isRecycledNumber(j,k))
							count++;
					}
				}

				outLine = "Case #" + (i + 1) + ": " + count;
				out.println(outLine);
			}
			in.close();
			out.flush();
			out.close();

		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	private static boolean isRecycledNumber(int j, int k) {
		String jStr = String.valueOf(j);
		String newStr;
		for(int i=1;i<jStr.length();i++){
			newStr= jStr.substring(i)+jStr.substring(0,i);
			if(k == Integer.valueOf(newStr))
				return true;
		}

		return false;
	}

}
