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));
	}
}

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;


public class RecycledNumbers {
	public static void main(String[] args) throws FileNotFoundException {
		Scanner scan = new Scanner(new File("input"));
		int cases = scan.nextInt();
		
		for (int i = 1; i <= cases; i++) {
			int A = scan.nextInt();
			int B = scan.nextInt();
			
			int numDigits = (int) (Math.log(A) / Math.log(10)) + 1;
			
			int digits[] = new int[numDigits];
			
			int tmp = A;
			
			for (int j = numDigits-1; j >= 0; j--) {
				digits[j] = tmp % 10; 
				tmp /= 10;
			}
			
			int recycled = 0;
			
			for (int j = A; j <= B; j++) {
				int val = j;
				for (int k = 0; k < numDigits; k++) {
					int temp = val % 10;
					val = (val / 10) + (temp * ((int) Math.pow(10, numDigits-1)));
					
					if (val == j) {
						break;
					}
					
					if (val >= A && val <= B && val > j) {
						recycled++;
					}
				}
			}
			
			System.out.println("Case #" + i + ": " + recycled);
		}
	}

}
