import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;


public class c_small
{

		static int u,l,j,n,m=0,k;
		static int arr[];
	
	public static void solve() throws Exception
	{
		PrintWriter out =new PrintWriter(new File("c_small.out"));
		Scanner sc =new Scanner(new File("c_small.in"));
		int testCase=sc.nextInt();
			
		for (int i = 1; i <= testCase; i++)
		{		int p;
				arr=new int[1000];
				
				l=sc.nextInt();
				u=sc.nextInt();
				int res=0,r=0;
				for(j=l;j<=u;j++)	
					{		
					
					String j1=Integer.toString(j);
				//out.println("j "+j1);
				for(int x=((j1.length())-1);x>=1;x--)
					{
					for(p=0;p<1000;p++){
					String c=j1.substring(x,(j1.length()));
					//out.println("c "+c);
					String a=c+(j1.substring(0,x));
					//out.println("a "+a);
					int n=Integer.parseInt(a);
						
					
					for(k=l;k<=u;k++)
					{
					if((k!=j) && (k==n) && (n!=arr[p]))
						{
				
						arr[p]=n;
				
				res=res+1;
						break;
						}	
					
					}
				}	
				
			
			}}
			out.println("Case #"+ i +": "+(res/2000));
		}
			
		out.close();
	}
	
	public static void main(String[] args) throws Exception
	{
		solve();
	}
	
}

