import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

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) {}

  }


}