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

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}


import java.util.ArrayList;
import java.util.Scanner;

public class CodeJam3 {

	public static void main(String[] args) {
		Scanner kb=new Scanner(System.in);
		int cases=kb.nextInt();
		for(int i=0;i<cases;i++)
		{
			long count=0;
			long value1=kb.nextInt();
			long value2=kb.nextInt();
			ArrayList<String> al=new ArrayList<String>();
			for(long k=value1;k<value2;k++)
			{
				String start=new Long(k).toString();
				long back=0;
				long next=0;
				for(int j=1;j<start.length();j++)
				{ 
					String temp=start.substring(j)+start.substring(0,j);
					long temp1=Long.parseLong(temp);
					next=temp1;
					if(value1<=k && k<temp1 && temp1<=value2)
					{
						/*al.add(temp);int m;
						for(m=0;m<al.size();m++)
						{
							if(temp1==Long.parseLong(al.get(m)))
							{
								
							}
						}
						if(m==al.size())
						{
							count++;
						}*/
						if(next!=back)
						{
							count++;
						}
						back=next;
						
						//System.out.println(k+"  "+temp1);
					}
				}					
			}
			System.out.println("Case #"+(i+1)+": "+count);
		}
		

	}

}
