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


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.util.*;
import java.io.*;
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class q_b {
	
	public static void main(String [] args) {		
		
		// Open files
		try {
			// Open input file
			FileInputStream iStream = new FileInputStream("Sample.in");
			// Get the DataInputStream object
			DataInputStream in = new DataInputStream(iStream);
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			
			//System.out.println("Input file opened");
			
			// Create output file 
			FileWriter oStream = new FileWriter("Sample.out");
			BufferedWriter out = new BufferedWriter(oStream);
			
			//System.out.println("Output file opened");
			
			// Read File Line By Line (and read first line)
			String strLine = br.readLine();
			int testN = Integer.parseInt(strLine);
			int caseN = 1;
			while ((strLine = br.readLine()) != null) {
 
				String[] nums = strLine.split(" ");
				
				int a = Integer.parseInt(nums[0]);
				int b = Integer.parseInt(nums[1]);
				
				int nDigits = nums[0].length();

				out.write("Case #" + caseN + ": ");
				//System.out.println(a+" "+b+"             \tCase #" + caseN + ": ");
				
				if (nDigits < 2) {
					out.write("0");
					out.newLine();
					//System.out.println("0");
					caseN++;
					continue;
				}
				
				int pow = 1;
				for(int i=0;i<nDigits-1;i++) pow = pow *10;
				
				int nPairs = 0;
					
				for (int i=a; i <= b; i++) {			
					
					int j = i;			
					int k = j;
					//System.out.print(j+" ");
					int m = 0;

					for(int z=1; z<nDigits; z++) {
						m = j % 10;
						
						j = j/10 + m*pow;
						
						//System.out.print(j+" ");
						if (j <= i || m == 0 || j > b || j == k) continue;
						nPairs++;
						//System.out.print("*** ");
						k = j;
					}
					//System.out.println();
				}

				String result = Integer.toString(nPairs);
				//System.out.println(result);
				out.write(result);
				if (caseN != testN) out.newLine();
				caseN++;
			}
			// Close the streams
			in.close();
			out.close();
		}catch (Exception e) {// Catch exception if any
			System.err.println("Error: " + e.getMessage());
		}
		System.out.println("Complete");
	}

}