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.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.HashSet;
import java.util.Scanner;

class c {
	public static void main(String[] args) throws FileNotFoundException {
		
		Scanner in = new Scanner(new File("1.in"));
		PrintStream out = new PrintStream(new File("1.out"));
		int T = Integer.parseInt(in.nextLine());

		for (int tt = 0; tt < T; tt++) {

			int a=in.nextInt(),b=in.nextInt();
			HashSet<Long> sols=new HashSet<Long>();
			for(int n=a;n<=b;n++)
			{

				String str="";
				str+=n;
				int len=str.length();
				for(int j=1;j<len;j++)
				{
					
					int p1,p2,m;
					p1=Integer.parseInt(str.substring(0,j));
					p2=Integer.parseInt(str.substring(j));
					m=p1=Integer.parseInt(""+p2+p1);
					if(m>n && m<=b )
						sols.add(n*2000001l+m);
				}
			}
			out.printf("Case #%d: %d\n", tt + 1, sols.size());

		}
	}
}