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


public class C {
	public static void main(String[] args) throws Exception {
//		Scanner in = new Scanner(new File("C-small-attempt0.bin"));
		Scanner in = new Scanner(new File("C-large.bin"));
//		Scanner in = new Scanner(new File("test.in"));
		int T = in.nextInt();
		for (int zz = 1; zz <= T; ++zz) {
			int A = in.nextInt();
			int B = in.nextInt();
			
			int r = 0;
//			HashSet<Integer> tested = new HashSet<>();
			for (int i = A; i < B; ++i) {
				int log = (int) Math.log10(i);
				int n = i;
				int p = (int) Math.pow(10, log+1);
				HashSet<Integer> tested = new HashSet<>(log);
				for (int l = 1; l <= log; ++l) {
					n *= 10;
					n = (n%p) + (n/p);
					if (tested.add(n) && n > i && n <= B)
						r++;
				}
			}
			
			System.out.format("Case #%d: %d\n", zz, r);
		}
		
	}
}
