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.*;
import java.util.regex.*;
import java.text.*;
import java.math.*;
import java.io.*;

public class RecycledNumbers {

	private final static String FILE_IN = RecycledNumbers.class.getSimpleName() + ".in";			
	private final static String FILE_OUT = RecycledNumbers.class.getSimpleName() + ".out";			
	
	public static void main(String[] args) throws Exception {
		final Scanner in = new Scanner(new File(FILE_IN));
		final PrintWriter out = new PrintWriter(FILE_OUT);
		final int testCnt = in.nextInt();
		for (int caseNum = 1; caseNum <= testCnt; ++ caseNum){
			final int a = in.nextInt();
			final int b = in.nextInt();			
			final int last [] = new int [b + 1];
			int result = 0;
			for (int i = a; i <= b; ++ i){
				final String s = String.valueOf(i);			
				for (int pos = 1; pos < s.length(); ++ pos){
					final String newNum = s.substring(pos) + s.substring(0, pos);
					final int newInt = Integer.valueOf(newNum);
					if (newInt > i && newInt <= b){
						if (last[newInt] != i){
							++ result;
							last[newInt] = i;
						}
					}
				}
			}
			out.println(String.format("Case #%d: %d", caseNum, result));
		}
		in.close();
		out.close();
	}

}
