/*
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 * and open the template in the editor.
 */
package gcj;

import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author daniele
 */
public class GCJ_C {
    
    public static void main(String[] args) throws Exception{
        
        
        
        Scanner in = new Scanner(new File(args[0]));
        FileWriter out = new FileWriter("/home/daniele/Scrivania/Output");
        

        int prove=in.nextInt();
        int min,max;
        int cifre;
        int cifreaus;
        String temp;
        int aus;
        int count=0;
        ArrayList<Integer> vals = new ArrayList<Integer>();
        int jcount=0;
        ArrayList<Integer> perm = new ArrayList<Integer>();
        
        out.write("");
        out.flush();
        
        for(int i=1;i<=prove;i++){
            
            out.append("Case #" +i+": ");out.flush();
            
            min=in.nextInt();
            max=in.nextInt();
            
            for(int j=min;j<=max;j++){
               if(!vals.contains(j)){
                    temp=""+j;
                    cifre=temp.length();
                    aus=j;
                    perm.add(j);
                    for(int k=1;k<cifre;k++){
                        aus=rotateOnce(aus);
                        temp=""+aus;
                        cifreaus=temp.length();//elusione zeri iniziali
                        if(aus>=min && aus<=max && aus!=j && cifreaus==cifre && nobody(vals,perm)){ 
                            perm.add(aus);
                            jcount ++;
                            
                        }
                        
                    }
                    while(jcount>0){count+=jcount; jcount--;}
                    vals.addAll(perm);
                    perm= new ArrayList<Integer>();
                    
                }
            }
            out.append(count+"\n");out.flush();
            count=0;
            vals= new ArrayList<Integer>();
        }
        
        
        
    }
        static public int rotateOnce(int n){
            String s=""+n;
            if(s.length()>1){
                s=s.charAt(s.length()-1) + s.substring(0,s.length()-1);
                n=Integer.parseInt(s);
            }
            return n;
        }    
        
        static public boolean nobody(ArrayList<Integer> v,ArrayList<Integer> a){;
            for(int i=0;i<a.size();i++)
                if(v.contains(a.get(i))) return false;
            return true;
        } 
    
}


import java.io.FileInputStream;
import java.util.*;
import java.math.*;

public class Main {
    
    static int[] toDigits(int val) {
        int count = 1;
        int temp = val / 10;
        while (temp > 0) {
            count++;
            temp /= 10;
        }
        int[] arr = new int[count];
        temp = val;
        for (int i = 0; i < arr.length; i++) {
            arr[i] = temp % 10;
            temp /= 10;
        }
        return arr;
    }
    
    static int toInt(int[] digits) {
        int res = 0;
        int p = 1;
        for (int i = 0; i < digits.length; i++) {
            res += p * digits[i];
            p *= 10;
        }
        return res;
    }
    
    public static void main(String[] args) throws Exception{
        Scanner scan = new Scanner(System.in);
        //Scanner scan  = new Scanner(new FileInputStream("C:\\Users\\wd\\Desktop\\"));
        char[] map = "yhesocvxduiglbkrztnwjpfmaq".toCharArray();
        int taskCount = scan.nextInt();
        scan.nextLine();
        for (int taskIndex = 1; taskIndex <= taskCount; taskIndex++) {
            int A = scan.nextInt();
            int B = scan.nextInt();
            long result = 0;
            for (int i = A; i <= B; i++) {
                HashSet<Integer> checker = new HashSet<Integer>();
                int[] base = toDigits(i);
                int[] copy = new int[base.length];
                for (int j = 0; j < base.length; j++) {
                    int index = base.length - 1;
                    for (int k = j; k >= 0; k--) {
                        copy[index--] = base[k];
                    }
                    for (int k = base.length - 1; k > j; k--) {
                        copy[index--] = base[k];
                    }
                    int convert = toInt(copy);
                    if (convert <= i || convert > B || checker.contains(convert)) {
                        continue;
                    }
                    //System.out.println(i + " " + convert);
                    checker.add(convert);
                    result++;
                }
            }
            System.out.println("Case #" + taskIndex + ": " + result);
        }
    }
}