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


public class RecycledNumbers {
	
	//static Set<String> seen = new Set<String>();
	static int min, max;
	static int count;
	
	public static void main (String[] args) throws IOException {
		Scanner in = new Scanner(new File("C-small.txt"));
		
		int cases;
		cases = in.nextInt();
		
		
		for (int n = 0; n < cases; n++) {
			//seen = new LinkedList<String>();
			min = in.nextInt();
			max = in.nextInt();
			
			count = 0;
			
			for (int i = min; i < max; i++) {
				findPairs(i);
			}
			
			System.out.println("Case #" + (n+1) + ": " + count);
		}

	}
	
	public static void findPairs(int num) {
		String n = "" + num;
		int result;
		
		for (int i = 1; i < n.length(); i++) {
			result = Integer.parseInt(n.substring(i) + n.substring(0, i));
			
			if (result > num && result <= max) {
				count ++;
			}
		}
	}
}