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.io.*;
public class Recycle
{
int t=0,A=0,B=0;
String output="";
int count=1;
public void readFile(String fn)
{
String data="";
try{
File in=new File(fn);
BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream(in)));
data=br.readLine();
t=Integer.parseInt(data);
while(count<=t)
{
data=br.readLine();
String s[]=data.split(" ");
A=Integer.parseInt(s[0]);
B=Integer.parseInt(s[1]);
computeRecycle();
count++;
}

br.close();
  }catch(Exception e){}
}

public static void main(String args[])
{
Recycle rc=new Recycle();
rc.readFile(args[0]);
rc.writeToFile();
}

public void computeRecycle()
{

int sum=0;
for(int i=A;i<=B;i++)
{
  String s=""+i;
  String t=s;
  int nm=0;
  int l=s.length();
  do
  {
  char c[]=t.toCharArray();
  char ch=c[0];
  for(int j=0;j<l-1;j++)
  {
   c[j]=c[j+1];   
  }
  c[l-1]=ch;

  t=new String(c);
  nm=Integer.parseInt(t);
   if(nm!=i && nm>=A && nm<=B)
   {
      sum++;
   }
  }while(nm!=i);
  
    
}

sum=sum/2;
output+="Case #"+count+": "+sum+"\n";

}


public void writeToFile(){
    try {
      File fout= new File("output.in");
      DataOutputStream dos = new DataOutputStream(new FileOutputStream(fout));
      dos.writeBytes(output);
      dos.close();
    } catch (Exception ex) {}

  }


}