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.File;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Scanner;

public class A {
	public static void main(String[] args) {
		new A().run();
	}

	private void run() {		
		Scanner s;
		try {
			s = new Scanner(new File("A.in"));
			
			int t = s.nextInt();
			s.nextLine();
			for (int i = 0; i < t; i++) {
				HashMap<String, Boolean> map = new HashMap<String, Boolean>();
				int count = 0;
				int a = s.nextInt();
				int b = s.nextInt();
				for(int j=a;j<=b;j++){
					String str = ""+j;
					String tmp = str;
					for (int k = 0; k < str.length()-1; k++) {
						tmp = tmp.charAt(tmp.length()-1) + tmp.substring(0, tmp.length()-1);
						int m = Integer.parseInt(tmp);
						if(Integer.parseInt(tmp) > j && m <=b ){
							if(!map.containsKey(j+"_"+m)){
								map.put(j+"_"+m, true);
								count++;
							}
						}
					}
				}
				System.out.println("Case #"+(i+1)+": "+count);
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}
