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.HashSet;
import java.util.Scanner;

public class RecycledNumbers {
	
	public static int[] POWER_OF_10 = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000};
	
	public static int rotate(int n, int offset) {
		return (n % POWER_OF_10[offset]) * POWER_OF_10[(int) Math.log10(n) + 1 - offset] + (n / POWER_OF_10[offset]);
	}
	
	public static int count(int low, int high) {
		int count = 0;
		if (low < 10) {
			low = 10;
		}
		
		HashSet<Integer> group = new HashSet<Integer>();
		for (int i = low; i < high; i++) {
			int numDigit = (int) Math.log10(i) + 1;
			while (numDigit > 0) {
				int num = rotate(i, numDigit--);
				if (num > i && num <= high && !group.contains(num)) {
					count++;
					group.add(num);
				}
			}
			group.clear();
		}
		
		return count;
	}
	
	public static void main(String[] args) {
		final Scanner in = new Scanner(System.in);
		final int numCase = in.nextInt();
		in.nextLine();
		for (int i = 0; i < numCase; i++) {
			int low = in.nextInt();
			int high = in.nextInt();
			System.out.println("Case #" + (i+1) + ": " + count(low, high));
			in.nextLine();
		}
	}
}
