package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

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) {}

  }


}