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.HashSet;
import java.util.Scanner;


public class qualifier3 {
	public static void main(String[] args)
	{

	Scanner sc = new Scanner(System.in);
	int numcases = sc.nextInt();
	sc.nextLine();
	for(int curcase = 1;curcase <=numcases;curcase++)
	{
		int min = sc.nextInt();
		int max = sc.nextInt();
		int numdigits = 0;
		for(int i=max;i>0;i/=10,numdigits++);
		int tennum =1;
		for(int i=0;i<numdigits;i++,tennum*=10);
		int count =0;
		for(int i=min;i<max;i++)
		{
			HashSet<Integer> seen = new HashSet<Integer>();
			int mult =1;
			for(int j=1;j<numdigits;j++)
			{mult*=10;
			int mine = ((i*mult)%tennum+(i/(tennum/mult)));
				if ((mine>i)&&(mine<=max)&&(!seen.contains(mine)))
					{
					count++;
					seen.add(mine);
					}
			}
		}
		sc.nextLine();
		
		
		System.out.println("Case #"+curcase+": "+count);
	
	}

	}
}
