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.
 */
package gcj2012.qual;

import java.io.File;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;

/**
 *
 * @author scbit
 */
public class P3 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        new P3().run();
    }
    PrintWriter pw;

    void run() throws Exception {
        File infile = new File("C-large.in");
        String outfile = "result";
        pw = new PrintWriter(outfile);
        int N = 0;
        //BufferedReader br=new BufferedReader(new FileReader(infile));
        //N=Integer.parseInt(br.readLine());
        Scanner sc = new Scanner(infile);
        N = sc.nextInt();

        for (int case_i = 1; case_i <= N; case_i++) {
            int result = 0;
            int A=sc.nextInt();
            int B=sc.nextInt();
            for(int n=A;n<=B;n++){
                int d=calcnum(n);
                int m=n;
                for(int i=1;i<d;i++){
                    int gewei=m%10;
                    m=m/10;
                   
                    if(gewei==0) continue;
                    for(int ii=1;ii<d;ii++){
                        gewei=gewei*10;
                    }
                    m=m+gewei;
                    if(m==n) break;
                    if(m>n && m <=B) result++;
                }
            }
            
            
            
            pw.printf("Case #%d: %s\n", case_i, result);
            System.out.printf("Case #%d: %s\n", case_i, result);
        }
        pw.close();
    }
    int calcnum(int num){
        int t=num;
        int c=0;
        
        while(t>0){
            t=t/10;
            c++;
        }
        return c;
        
    }
}
