import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class GoogleC {
	public String szamol(String input){
		String result="";
		String a=input;
		Integer min=Integer.parseInt(a.substring(0,a.indexOf(' ')));
		a=a.substring(a.indexOf(' ')+1);
		Integer max=Integer.parseInt(a);
		Long count=0l;
		for(Integer i=min; i<=max; i++){
			String e1=i.toString();
			Set<Integer> db=new HashSet<Integer>(); 
			for (int j=1; j<e1.length();j++){
				
				String e2=e1.substring(j)+e1.substring(0,j);
				Integer k=Integer.parseInt(e2);
				if (k>i && k<=max){
					db.add(k);
					//System.out.println(e1+"\t"+e2);
				}
				
			}
			count+=db.size();
		}
		
		return count.toString();
	}
	public static void main(String[] args) {
		GoogleC a=new GoogleC();
		//String filename="input.txt";
		//String filename="C-small-attempt0.in";
		String filename="C-large.in";
		String thisLine;
		try {
			BufferedReader br = new BufferedReader(new FileReader(filename));
			BufferedWriter bw= new BufferedWriter(new FileWriter(filename+".out"));
			thisLine=br.readLine();
			Integer tnum=Integer.parseInt(thisLine);
		     for(int i=0;i<tnum;i++) { // while loop begins here
		    	 	thisLine=br.readLine();
		           System.out.println(thisLine);
		           System.out.println("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		           bw.write("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		         } // end while 
		        // end try
		     br.close();
		     bw.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}


	}

}

import java.util.*;
import java.io.*;
import static java.lang.Math.*;

public class C {
	public static void main(String[] args) throws IOException {
		/*BufferedReader in = new BufferedReader(new FileReader("C:/Users/Farnoosh/Desktop/C-small.in"));
		FileWriter fw = new FileWriter("C:/Users/Farnoosh/Desktop/C-small.out");*/
		BufferedReader in = new BufferedReader(new FileReader("C:/Users/Farnoosh/Desktop/C-large.in"));
		FileWriter fw = new FileWriter("C:/Users/Farnoosh/Desktop/C-large.out");
		
		int N = new Integer(in.readLine());
		
			
		//System.out.print(N);
		 for (int cases = 1; cases <= N; cases++) {
			int count = 0;
			String[] ss = in.readLine().split(" ");
			
			int A = Integer.parseInt(ss[0]);
			int B = Integer.parseInt(ss[1]);
			
			
			for(int num = A ; num <= B ; num++){
				int num2 = 0;
				int len = (int)Math.pow(10, Integer.toString(num).length()-1);
				
				int i = 0;
				int num1 = num;
				for(i = 1; i < Integer.toString(num).length() ; i++){
					
					if(Integer.toString(num2).length() == Integer.toString(num1).length() || num2==0){
						num2 = 10 * (num1 % len) + (num1 / len);
					}
					else{
						num2 = num2 * 10;
					}
				
				    if(num2 == num)
				    	break;
					
					if (num2 <= B && num2 > num){
						count++;
					}// end of if
					num1 = num2;
				}//end of for
				

			}//end of for
					
			fw.write ("Case #" + cases + ": " + count + "\n");
		} 
		

		fw.flush();
		fw.close();
	}

}