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.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.Scanner;


public class C {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(new FileReader(new File("C.in")));
		PrintWriter out = new PrintWriter(new FileWriter("C.out"));
		int tests = in.nextInt();
		int A,B;
		for (int i = 1; i <= tests; i++) {
			out.print("Case #" + (i) + ": ");
			System.out.print("Case #" + (i) + ": ");	
			A = in.nextInt();B = in.nextInt();
			int cnt = 0;
			for (int j = A; j <= B; j++) {
				int len = (j+"").length();
				for (int k = 1; k < len; k++) {
					int num = cycle(j,k);
					if(num > j && num <= B)cnt++;
				}
			}			
			out.println(cnt);
			System.out.println(cnt);
		}
		out.close();
	}
	
	public static int cycle(int x,int i){
		String n = x+"";
		String tmp = n.substring(i);
		return Integer.parseInt(tmp + n.substring(0,i));
	}
}
