import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Scanner;
import java.util.TreeSet;

// Recycled Numbers
// https://code.google.com/codejam/contest/1460488/dashboard#s=p2

public class C {

	private static String process(Scanner in) {
		int A = in.nextInt();
		int B = in.nextInt();
		int res = 0;
		int len = Integer.toString(A).length();
		for(int n = A; n < B; n++) {
			String str = Integer.toString(n);
			TreeSet<Integer> set = new TreeSet<Integer>();
			for(int i = 1; i < len; i++) {
				int m = Integer.parseInt(str.substring(i, len) + str.substring(0, i));
				if ( m > n && m <= B && ! set.contains(m) ) {
					set.add(m);
					res++;
				}
			}
		}
		return Integer.toString(res);
	}

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(System.in.available() > 0 ? System.in : 
			new FileInputStream(Thread.currentThread().getStackTrace()[1].getClassName() + ".practice.in"));
		int T = in.nextInt();
		for(int i = 1; i <= T; i++) 
			System.out.format("Case #%d: %s\n", i, process(in));
	}
}

/*
ID: 14vikra1
LANG: JAVA
TASK: recycled
*/
import java.io.*;
import java.util.*;

class recycled {
	public static void main (String [] args) throws IOException {
		long start = System.currentTimeMillis();
		BufferedReader br = new BufferedReader(new FileReader("recycled.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("recycled.out")));
		int T = Integer.parseInt(br.readLine());
		for (int i = 0; i < T; i++) {
			StringTokenizer st = new StringTokenizer(br.readLine());
			int A = Integer.parseInt(st.nextToken());
			int B = Integer.parseInt(st.nextToken());
			int pairs = 0;
			int size = (int)(Math.floor(Math.log(A)/Math.log(10)))+1;
			for (int j = A; j < B; j++) {
				pairs += checkPairs(j, A, B, size);
			}
			out.println("Case #" + (i+1) + ": " + pairs);
		}
		long end = System.currentTimeMillis();
		System.out.println(end-start);
		out.close();
		System.exit(0);        
	}
	public static int checkPairs(int num, int A, int B, int size) {
		int numpairs = 0;
		ArrayList used = new ArrayList();
		for (int i = 1; i < size; i++) {
			int move = (int)(num%Math.pow(10, i));
			int test = (int)((num)/Math.pow(10,size-i+1));
			if (move >= test) {
				int newnum = (int)((num - move)/Math.pow(10,i));
				newnum = newnum + move*(int)(Math.pow(10,size-i));
				if (newnum > num && newnum <= B && !used.contains(newnum)) {
					numpairs++;
					used.add(newnum);
				}
			}
		}
		return numpairs;
	}
}

