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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;


public class RecycledNumbers {
	public static void main(String[] args) throws IOException{
		Scanner scanner = new Scanner(new File("input.txt"));
		int numCases = scanner.nextInt();
		
		PrintWriter pw = new PrintWriter(new File("output3.txt"));

		for(int i=1; i <= numCases; i++){
			long a = scanner.nextLong();
			long b = scanner.nextLong();
			
			int result = 0;
			// Computer number of digits
			long digits = computeNumOfDigits(a);
			// Iterate over all numbers
			for(long n=a; n <=b; n++){
				long m = n;
				HashSet<Long> generateNumbers = new HashSet<>();
				for(long j = 1; j < digits; j++){
					m = rotateRightMostDigit(m, digits);
					generateNumbers.add(m);				
				}
				
				// Iterate over all numbers generated by each number
				for(Long l:generateNumbers){
					if(computeNumOfDigits(l)==digits && l>n && l<=b){
						result++;
					}	
				}
				
			}
			//System.out.println("Case #" + i + ": " + result);
			pw.println("Case #" + i + ": " + result);
			pw.flush();
		}
	}

	private static long rotateRightMostDigit(long m, long digits) {
		long d = m%10;
		long rightPart = m/10;
		long leftPart = (int) Math.pow(10.0, digits -1);
		long result = (leftPart * d) + rightPart;
		return result;
	}

	private static long computeNumOfDigits(long inputNum) {
		if(inputNum == 0){
			return 1;
		}
		
		long digits = 0;
		
		while(inputNum!=0){
			inputNum = inputNum/10;
			digits++;
		}
		return digits;
	}

}
