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 QualificationC;

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

public class ProblemC {
	
	public static void main(String args[]) throws Exception{
		System.out.println(args[0]);
		FileReader fr = new FileReader(args[0]);
		BufferedReader br = new BufferedReader(fr);	
		
		int T = Integer.parseInt(br.readLine());
		
		System.out.println(T);
		
		for(int t=0;t<T;t++) {
			String[] input = br.readLine().split(" ");
			int result = 0;
			
			int A = Integer.parseInt(input[0]);
			int B = Integer.parseInt(input[1]);
			int size = B - A;
			
			for(int i = 0; i<= size; i++) {
				String string = String.valueOf(i + A);
				int val = Integer.parseInt(string);
				
				String foo[] = permute(string);
				if(foo == null) continue;
				
				for(int j=0;j<foo.length;j++) {
					int swapval = Integer.parseInt(foo[j]);
					
					if(swapval < A || swapval > B) continue;
					if(swapval <= val) continue;
					
					result++;
					
//					System.out.println(swapval);
				}
			}
			
			System.out.println("Case #" + (t+1) + ": " + result);
			
		}
	}
	
	
	public static String shiftString(String a) {
		return a.substring(1) + a.charAt(0);
	}
	
	public static String[] permute(String a) {
		int len = a.length();
		
		if(len <= 1) return null;
		
		
		String[] result = new String[len - 1];
		result[0] = shiftString(a);
		for(int i=1;i<len - 1;i++) {
			result[i] = shiftString(result[i-1]);
		}
		
		HashSet<String> set = new HashSet<String>(Arrays.asList(result));
		result = set.toArray(new String[0]);
		
//		String[] answer = set.toArray(new String[0]);	
//		if(set.size() != result.length) {
//			System.out.println("--b4--");
//			System.out.println(Arrays.toString(result));
//			
//			System.out.println("--after--");
//			System.out.println(Arrays.toString(answer));
//			System.out.println("-----");
//		}
		
//		System.out.println(Arrays.toString(result));
		return result;
	}
	
}
