import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Problem3 {

	
	public static void main(String arg[])
	{
		

	
	 try{
         FileInputStream fstream = new FileInputStream("textfile.txt");
         DataInputStream in = new DataInputStream(fstream);
         BufferedReader br = new BufferedReader(new InputStreamReader(in));
         
         FileWriter foutstream = new FileWriter("d:\\Problem3output.txt");
         BufferedWriter out = new BufferedWriter(foutstream);
         
         
         String strLine, copyStrLine = "";
         int caseCount = -1;
         strLine = br.readLine();
         caseCount = Integer.parseInt(strLine);
         for(int j=0; j < caseCount; j++)
                 //System.out.println (strLine);
         {
        	 strLine = br.readLine();
        	 String[] splitStrings = strLine.split(" ");
        	 int A = Integer.parseInt(splitStrings[0]);
        	 int B = Integer.parseInt(splitStrings[1]);
        	 int recycleCount = 0;
        	 for(int n = A; n < B; n++)
        	 {
        		int count = 10 ;
        		int counter = 0;
        		int len = splitStrings[1].length()-1;
        		int  arrayNumbers[];
        		
        		HashSet hashSet = new HashSet();
        		while(counter < len)
        		{
        			int tail = n % count;
        			int front = n / count;
        			
        			count = count * 10 ;
        			int val = (int) Math.pow(10,(len - counter));
        			int m = tail * val + front;
        			//System.out.println(i+":"+":"+temp+":"+val);
        			if(m > A && m <= B && m > n)
        			{
        				hashSet.add(new Integer(m));
        			}
        			counter++;
        		}
        		recycleCount = recycleCount + hashSet.size();
        	 }
        	 System.out.println(recycleCount);
           
           	out.write("Case #" + (j + 1) + ": " + recycleCount + "\n");
         
         }
         out.close();
	 	} 
	 catch (Exception e) {
         System.err.println("Error: " + e.getMessage());
 
	   }
	}
}
