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.io.*;
import java.util.*;
public class Prob3 {
	public static PrintStream out;
	public static int caseNum;
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(new File("in.txt"));
		out = new PrintStream(new File("out.txt"));
		int numCases = Integer.parseInt(sc.nextLine());
		caseNum = 0;
		for(int i=0; i<numCases; i++)
			solve(sc.nextLine());
	}
	public static void solve(String input){
		StringTokenizer st = new StringTokenizer(input, " ");
		int from = Integer.parseInt(st.nextToken());
		int to = Integer.parseInt(st.nextToken());
		int numDigits = (int) Math.floor(Math.log10(from)) + 1;
		int digitsPow10 = (int) Math.pow(10, numDigits-1);
		int numPairs = 0;
		for(int i=from; i<=to; i++){
			int recycled = recycle(i, digitsPow10);
			while(recycled != i){
				if(recycled>=from && recycled<=to)
					numPairs++;
				recycled = recycle(recycled, digitsPow10);
			}
		}
		caseNum++;
		out.println("Case #"+caseNum+": "+(numPairs/2));
	}
	public static int recycle(int num, int digitsPow10){
		while(true){
			int lastDigit = num%10;
			num = lastDigit*digitsPow10 + num/10;
			if(lastDigit!=0)
				break;
		}
		return num;
	}
}