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.util.Scanner;


public class RecycledNumbers {
	
	static int recycle(int n, int B) {
		String nString = String.valueOf(n);
		
		int out = 0;

		for (int i = 0; i < nString.length(); i++) {
			int cut = nString.length() - (i + 1);
			String temp = nString.substring(cut) + nString.substring(0, cut);
			
			int pair = Integer.parseInt(temp);
				
			if (n < pair && pair <= B) {
				//System.out.println(n + " " + pair);
				out++;
			}
		}
		
		return out;
	}
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int cases = sc.nextInt();
		
		StringBuilder out = new StringBuilder();
		for (int i = 1; i <= cases; i++) {
			int A = sc.nextInt();
			int B = sc.nextInt();

			int pairs = 0;
			
			for (int j = A; j < B; j++) {
				pairs += recycle(j, B);
			}
			
			out.append("Case #" + i + ": " + pairs + "\n");
		}
		
		System.out.print(out);
	}
}
