import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.awt.print.Printable;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;


public class C {
    public static void main(String[] args) throws IOException {
        Scanner scanner = null;
        scanner = new Scanner(new File("C-large.in"));
//        scanner = new Scanner(System.in);
        FileWriter writer = new FileWriter("C.out");
        int t = scanner.nextInt();
        for (int tt = 1; tt <= t ; tt ++ ) {
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            
            String str;
            int k;
            int ans = 0;
            String tmp;
            for (int i = a; i <= b; i ++) {
                str = Integer.toString(i);
                if (str.length() > 1) {
                    for (int j = 1; j < str.length(); j++) {
                        tmp = str.substring(j, str.length())
                        + str.substring(0,j);
                        if (tmp.startsWith("0")) continue;
                        k = Integer.parseInt(tmp);
                        if (k >=a && k <= b && k > i) ans ++;
                    }
                }
            }
            
            writer.write(String.format("Case #%d: %d\n", tt,ans));
            System.out.println(String.format("Case #%d: %d\n", tt,ans));
        }
        writer.close();
    }

}
