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.util.ArrayList;
import java.util.List;


public class RecycledNumbers {

	private int A;
	private int B;
	
	public RecycledNumbers(int A, int B) {
		this.A = A;
		this.B = B;
	}
	
	public int calculate() {
		int result = 0;
		int digitCount = Integer.toString(A).length();
		
		if (digitCount == 1) return 0;
		
		List<String> numbers = new ArrayList<String>();
		for (int i = A; i < B + 1; i++) {
			numbers.add(Integer.toString(i));
		}
		
		for (int i = 0; i < numbers.size(); i++) {
			String number = numbers.get(i);
			
			for (int j = 1; j < digitCount; j++) {
				String reverseNumber = number.substring(j) + number.substring(0, j);
				int reversInt = Integer.parseInt(reverseNumber);
				
				if ((reversInt <= B) && (reversInt > Integer.parseInt(number))) {
//					System.out.println("A(" + A + ") <= " + number + " < " + reverseNumber + " <=B(" + B + ")");
					result++;
				}
			}
		}
		
		return result;
	}
	
	public static List<RecycledNumbers> parseFromFile(List<String> readInput) {
		List<RecycledNumbers> result = new ArrayList<RecycledNumbers>();
		int testCaseCount = Integer.parseInt(readInput.get(0));

		for (int i = 0; i < testCaseCount; i++) {
			String line[] = readInput.get(i + 1).split(" ");

			result.add(new RecycledNumbers(Integer.parseInt(line[0]), Integer.parseInt(line[1])));
		}

		return result;
	}
	
	@Override
	public String toString() {
		return "A = " + A + "; B = " + B;
	}
}
