package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */


import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

/**
 *
 * @author linlin
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws FileNotFoundException, IOException {
        // TODO code application logic here
        File file=new File("C-large.in");
        FileOutputStream o=new FileOutputStream("a.txt");
        Scanner s=new Scanner(file);
        int t=Integer.valueOf(s.nextLine());
        for(int i=1;i<=t;i++){
            String line=s.nextLine();
            String[] num=line.split(" ");
            int a=Integer.valueOf(num[0]);
            int b=Integer.valueOf(num[1]);
            int d=1;
            int tens=10;
            for(;tens<=a;tens=tens*10)
                    d++;
            tens=tens/10;

            int[] total=new int[d];
            for(int q=a;q<=b;q++){
                int correct=0;
                int q1=q;
                boolean shift=true;
                for(int k=0;k<d;k++){

                    int r1=q1%10;
                    q1=q1/10+r1*tens;
                    if((q1==q)&&shift)
                        break;
                    else if((q1>=a)&&(q1<=b)){
                        correct++;
                        //System.out.println(q1);
                    }
                    shift=false;
                    
                }
                if(correct>1){
                    total[correct-1]=total[correct-1]+1;
                   
                }

            }
            int result=0;
            for(int n=1;n<d;n++){
                result=result+(total[n]*n/2);
                
            }
            String out="Case #"+i+": "+result+"\r\n";
            o.write(out.getBytes());



        }
    }

}
