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.File;
import java.lang.StringBuilder;
import java.util.Scanner;
import java.io.FileWriter;

public class RN {
	
	public static void main(String[] args) throws Exception{
		File input = new File("C-small-attempt1.in");
		File output = new File("output.out");
		FileWriter fw = new FileWriter(output);
		Scanner s = new Scanner(input);
		
		int numloops = s.nextInt();
		StringBuilder sb = new StringBuilder();
		
		for(int n=0; n<numloops; n++){
			sb.append("Case #" + (n+1) + ": ");
			
			int low = s.nextInt();
			int hi = s.nextInt();
			int numrepeats = 0;
			
			for(int i=low; i<hi; i++){
				String strnum = "" + i;
				//System.out.println(strnum);
				
				for(int j=1; j<strnum.length(); j++){
					String rotstr = strnum.substring(j) + strnum.substring(0,j);
					//System.out.println(rotstr);
					int rotval = Integer.parseInt(rotstr);
					rotstr = "" + rotval;
					
					if(rotval > i && rotval <= hi ){//&& rotstr.length() == strnum.length()){
						numrepeats++;
						//System.out.println(strnum + " " + rotstr);
					}
					
					if(rotval == i)
						;//break; //already had a repeating number
				}
			}
			sb.append(numrepeats + "\n");
			//fw.append(numrepeats + "\n");
		}
		fw.write(sb.toString());
		fw.close();
	}
}
