import java.util.*;
import java.io.*;

public class recycled_numbers {
	public static void main(String[]a) throws Exception{
		
		Scanner f = new Scanner(new File(a[0]));
		int result=0;
		int A,B;
		String n,m;
		HashSet<String> s=new HashSet<String>();
		
		int T=f.nextInt();	//T total case count
		for (int t=1; t<=T;t++){//for each case t
			
			s.clear();
			result=0;				//reset
			A=f.nextInt();B=f.nextInt();	//get values for next case
			
			if (A==B)result=0;//remove case not meeting problem limits 
			else{
				for(int i=A;i<=B;i++){//for each int in range
					n=Integer.toString(i);
					m=new String(n);
					//System.out.println(n);
					for (int j=1;j<n.length();j++){//move each digit to the front & test
						m = m.substring(m.length()-1)+m.substring(0,m.length()-1);
						if(m.matches("^0+[\\d]+")!=true &&
								Integer.parseInt(m)<=B &&
								Integer.parseInt(n)<Integer.parseInt(m)){
							s.add(new String(n+","+m));
							//result++;
							//System.out.println(" matched: "+m);
						}
						
					}
				}
				result = s.size();
			}

			//display output
			System.out.println("Case #" + t + ": " + result);
		}
	}
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;


public class R1Q3 {
	public static HashMap<String, String> wordMap;
	
	public static void main(String []args) throws NumberFormatException, IOException{
		BufferedReader bf = new BufferedReader(new FileReader(new File("input")));
		BufferedWriter bw = new BufferedWriter(new FileWriter(new File("output")));
		int num = Integer.parseInt(bf.readLine());
		String aString = "123";
		
		for (int i = 1 ; i<=num; i++){
			int nums = 0;
			String line = bf.readLine();
			String[] argss =line.split(" ");
			int small = Integer.parseInt(argss[0]);
			int large = Integer.parseInt(argss[1]);
			HashSet<Integer> already = new HashSet<Integer>();
			for (int j = small; j< large; j++){
				if (j<10) continue;
				already.clear();
				already.add(j);
				String temp = String.valueOf(j);
				for (int k = 1; k < temp.length(); k++){
					int m = k;
					int newnum  = j/(int)(Math.pow(10, temp.length()-k));
					newnum+= (j%(int)(Math.pow(10, temp.length()-k)))*Math.pow(10, k);
					if (!already.contains(newnum)&&newnum<=large&&newnum>=small&&newnum>j){
						nums++;
						already.add(newnum);
					}
				}
			}
			System.out.println(i);
			bw.write("Case #"+i+": "+nums+"\n");
		}
		bf.close();
		bw.close();
	}
}
