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.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;



public class CRecycledNumbers {
	
	static int recycle(int a, int b) {
//		System.out.println("-------------------------");
//		System.out.println(a + " " + b);
		int count = 0;
		Set<String> used = new HashSet<String>();
		for(int i = a; i < b; ++i) {
			String s = Integer.toString(i);
			for(int j = 1; j < s.length(); ++j) {
				String pre = s.substring(0, j);
				String suf = s.substring(j);
				if(suf.startsWith("0")) continue;
				int c = Integer.parseInt(suf + pre);
				if(c <= b && c != i && i < c) {
					String p = i < c? (i + "-" + c) : (c + "-" + i);
					if(!used.contains(p)) {
						used.add(p);
//						System.out.println(p);
						++count;
					}
				}
			}
			
		}
		
		return count;
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
		String filename = "C-large.in";
		BufferedReader r = new BufferedReader(new FileReader(filename));
		int n = Integer.parseInt(r.readLine());
		PrintWriter p = new PrintWriter("c.out");
		for(int i = 0; i < n; ++i) {
			String[] test = r.readLine().split(" ");
			int j = i + 1;
			p.println("Case #" + j + ": " +  recycle(Integer.parseInt(test[0]), Integer.parseInt(test[1])));
			
		}
		p.flush();
		p.close();
	}

}
