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();
    }
}

/*
 * 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());



        }
    }

}
