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.*;
import java.util.HashSet;

public class C {
	int a, b;
	
	int countRec(int num){
		char[] digits = String.valueOf(num).toCharArray();
		int n = digits.length;
		char[] rec = new char[n];
		HashSet<Integer> set = new HashSet<Integer>();
		int cnt=0;
		
		for(int i=1; i<n; i++){
			int index = i;
			for(int j=0; j<n; j++, index++){
				if(index>=n) index%=n;				
				rec[j] = digits[index];
			}
			
			int out = Integer.parseInt(String.valueOf(rec));
			if(out > num && out <= b && !set.contains(out)){
				cnt++;
				set.add(out);
			}
		}
		
		return cnt;
	}
	
	public void run() throws IOException{
		BufferedReader bf = new BufferedReader(new FileReader("c.in"));
		PrintWriter pw = new PrintWriter(new FileWriter("c.out"));
		
		int kases = Integer.parseInt(bf.readLine());
		for(int kase=1; kase<=kases; kase++){
			String[] in = bf.readLine().trim().split("[ ]+");
			a = Integer.parseInt(in[0]);
			b = Integer.parseInt(in[1]);
			
			long ret = 0;
			for(int i=a; i<=b; i++) ret+= countRec(i);
			
			pw.println("Case #" + kase + ": " + ret);
		}
		
		pw.close();
	}
	
	public static void main(String[] args) throws IOException {
		new C().run();
	}
}
