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.PrintWriter;
import java.util.HashMap;
import java.util.Scanner;


public class C {

	
	
	
	public static void main(String[] args)throws Exception {
		Scanner sc = new Scanner(new File("C-large.in"));
		PrintWriter pw = new PrintWriter(new File("outputCLarge.out"));
		int n = sc.nextInt();
		for (int i = 0; i < n; i++) {
			int min = sc.nextInt();
			int max = sc.nextInt();
			long conteo=0;		
			for (int j = min; j <= max; j++) {
				conteo+=contarReps(j,min,max);
			}
			pw.println("Case #"+(int)(i+1)+": "+(int)(conteo/2));
		}
		pw.close();
		System.out.println("Done");
	}
	
	static long contarReps(int num,int min,int max){
		StringBuffer strNum = new StringBuffer(""+num);
		StringBuffer strNumO = new StringBuffer(""+num);
		HashMap<String,String> mapa = new HashMap();
		mapa.put(""+num,""+num);
		String str;
		int rev;
		long count=0;
		for (int i = 0; i < strNum.length()-1; i++) {
			strNum.append(strNum.charAt(0));
			strNum.deleteCharAt(0);
			rev = Integer.parseInt(strNum.toString());
			str = strNum.toString();
			if(mapa.get(str)==null){
				mapa.put(str, str);
				if(rev>=min && rev<=max && rev!=num)
					count++;
			}
		}
		return count;
	}
	
	static int compare(StringBuffer bf1, StringBuffer bf2){
		for (int i = 0; i < bf1.length(); i++) {
			if(bf1.charAt(i)>bf2.charAt(i)){
				return 1;
			}else if(bf1.charAt(i)<bf2.charAt(i)){
				return -1;
			}
		}
		return 0;
	}
}
