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.util.*;
public class C {
	public static void main (String [] arg) {
		
		int [][] store = new int [2000010][7];
		for (int i = 1; i<store.length; ++i) {
			int ptr = 0;
			int j = rotate(i);
			while (j != i) {
				if (j > i) store[i][ptr++] = j;
				j = rotate(j);
			}
		}
		Scanner sc = new Scanner(System.in);
		int T = Integer.parseInt(sc.nextLine());
		for (int ii = 1; ii<=T; ++ii) {
			//Something
			int A = sc.nextInt();
			int B = sc.nextInt();
			int count = 0;
			for (int a = A; a<B; ++a)
				for (int i = 0; i<store[a].length && store[a][i] > 0; ++i) 
					if (store[a][i] <= B) count++;
			
			
			int ans = count;
			System.out.printf("Case #%d: %s\n",ii,ans);
		}
	}
	public static int rotate(int a) {
		String s = Integer.toString(a);
		do {
			s = s.substring(1) + s.charAt(0);
		} while (s.charAt(0) == '0');
		
		return Integer.parseInt(s);
	
	}
	
}