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.*;
import java.math.*;
//run with -Xmx1024M
public class C implements Runnable {
	
	private long solve(int A, int B) {
		int pow = 1;
		while (pow <= A/10) {
			pow *= 10;
		}
		HashSet<Long> h = new HashSet<Long>();
		for (int n = A; n <= B; ++n) {
			int nn = n;
			nn = (nn%pow)*10 + (nn/pow);
			
			while (nn != n) {
				if (A <= nn && nn <= B) {
					if (nn < n) {
						h.add(1L*nn*pow*10+n);
					}
					else {
						h.add(1L*n*pow*10+nn);
					}
				}
				nn = (nn%pow)*10 + (nn/pow);
			}
		}
		return h.size();
	}
	
	public void run() {
		int n = nextInt();
		for (int i = 0; i < n; ++i) {
			int A = nextInt();
			int B = nextInt();
			long ans = solve(A, B);
			out.println("Case #"+(i+1)+": "+ans);
		}
		out.flush();
	}
	
	private static BufferedReader br = null;
	private static StringTokenizer stk = null;
	private static PrintWriter out = null;
	
	public static void main(String[] args) throws IOException {
		br = new BufferedReader(new FileReader(new File("D:\\C.txt")));
		out = new PrintWriter("D:\\CC.txt");
		(new Thread(new C())).start();
	}
	
	public void loadLine() {
		try {
			stk = new StringTokenizer(br.readLine());
		}
		catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public String nextLine() {
		try {
			return (br.readLine());
		}
		catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public int nextInt() {
		while (stk==null || !stk.hasMoreTokens()) loadLine();
		return Integer.parseInt(stk.nextToken());
	}
	
	public long nextLong() {
		while (stk==null || !stk.hasMoreTokens()) loadLine();
		return Long.parseLong(stk.nextToken());
	}
	
	public double nextDouble() {
		while (stk==null || !stk.hasMoreTokens()) loadLine();
		return Double.parseDouble(stk.nextToken());
	}
	
	public String nextWord() {
		while (stk==null || !stk.hasMoreTokens()) loadLine();
		return (stk.nextToken());
	}
}
