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.HashMap;
import java.util.Scanner;


public class recyclednumbers {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int numOfLines = Integer.parseInt(in.nextLine());
		for(int i = 0;i<numOfLines;i++)
		{
			String resultline = "Case #"+(i+1)+": "+readLine(in.nextLine());
			System.out.println(resultline);
		}
	}
	
	public static int checkNumber(int min,int max, int number)
	{
		String numberString = String.valueOf(number);
		HashMap<Integer,Integer> map = new HashMap<Integer, Integer>();
		int length = numberString.length();
		for(int i =1;i<length;i++)
		{
			int recycled = Integer.parseInt(numberString.substring(i,length)+numberString.substring(0,i));
			if(recycled > number&&recycled<=max)
			{
				map.put(recycled, 0);
			}
		}
		return map.size();
	}
	
	public static int checkRange(int start,int end)
	{
		int count = 0;
		for(int i = start;i<end;i++)
		{
			count += checkNumber(start, end, i);
		}
		return count;
	}
	
	public static String readLine(String line)
	{
		String[] pair = line.split(" ");
		int result = checkRange(Integer.parseInt(pair[0]),Integer.parseInt(pair[1]));
		return String.valueOf(result);
	}

}
