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 com.sokamura.gcj2012;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashSet;
import java.util.Set;

public class RecycledNumbers {
	public int solve(int n1, int n2) {
		int ans = 0;
		for(int i=n1; i<n2; ++i) {
			Set<Integer> list = generate(i);
			for(int n : list) {
				if(n <= n2){ ans++; }
			}
		}
		return ans;
	}
	
	private Set<Integer> generate(int n) {
		String s = String.valueOf(n);
		Set<Integer> list = new HashSet<Integer>();
		for(int i=1; i<s.length(); ++i) {
			int n2 = Integer.parseInt(s.substring(i) + s.substring(0, i));
			if(n < n2) {
				list.add(n2);
			}
		}
		return list;
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO ©®¶¬³ê½\bhEX^u
		RecycledNumbers rn = new RecycledNumbers();
		try {
			FileReader fr = new FileReader("C-small-attempt1.in");
			BufferedReader br = new BufferedReader(fr);
			String lineNum;
			lineNum = br.readLine();
			for(int i=1; i<=Integer.parseInt(lineNum); ++i) {
				String line = br.readLine();
				String[] array = line.split(" ");
				int n1 = Integer.parseInt(array[0]);
				int n2 = Integer.parseInt(array[1]);
				System.out.println("Case #" + i + ": " + rn.solve(n1,n2));
			}
		}
		catch(Exception e) {
			e.printStackTrace();
		}
	}

}
