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));
	}
}

//saurabh

import java.io.*;
import java.util.*;

public class Recycle
{
	public static void main(String args[]) throws IOException
	{
		Recycle ob=new Recycle();
		int T,A,B;
		Scanner c= new Scanner(new File("Recycle.txt"));
		T=c.nextInt();
		int ans[]=new int[T];
		for(int i=0;i<T;i++)
		{	
			A=c.nextInt();
			B=c.nextInt();
			int nPairs=0;
			for(int j=A;j<B;j++)
			{
				nPairs+=ob.get_pairs2(j,B);
			}
			ans[i]=nPairs;
		}
				
		for(int i=0;i<T;i++)
			System.out.println("Case #"+(i+1)+": "+ans[i]);
	}
	
	int get_pairs2(int x, int B)
	{
		int base=x;
		String s=Integer.toString(B);
		int n=s.length();
		double mul=Math.pow(10,(n-1));
		LinkedList<Integer> L=new LinkedList<Integer>();
		for(int i=0;i<n;i++)
		{
			int y=x%10;
			x/=10;
			x+=y*mul;
			if(x>base && x<=B)
				if(!L.contains(x)) {
					L.add(x);
				}
		}
		return L.size();
	}
}
