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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;


public class Recycled {

	
	public static boolean isRecycled(int a, int b) {
		String left = a+"";
		String right = b+"";
		return (left+left).contains(right);
		//		if(left.length()!=right.length()) return false;
//		int l = left.length();
//		for(int i=0;i<l;i++) {
//			boolean o = true;
//			for(int j=0;j<l;j++) {
//				if(left.charAt((i+j)%l) == right.charAt(j)) continue;
//				else o=false;
//			}
//			if(o) return true;
//		}
//		return false;
	}
	
	public static Set<Integer> recycles(int in) {
		String s = in+"";
		int l = s.length();
		Set<Integer> out = new HashSet<Integer>();
		for(int i=1;i<l;i++) {
			String n = "";
			for(int j=0;j<l;j++) n += s.charAt((i+j)%l);
			out.add(Integer.parseInt(n));
		}
		return out;
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		
		int cases = Integer.parseInt(in.readLine());
		for (int i = 1; i <= cases; i++) {
			String[]e = in.readLine().trim().split(" ");
			int A = Integer.parseInt(e[0]);
			int B = Integer.parseInt(e[1]);
			
			int count = 0;
			
			for(int x=A;x<B;x++) {
				for(int y:recycles(x)) {
					if(x<y && y<=B) count ++;
				}
			}
			
			System.out.println("Case #"+i+": "+count);
		}
	}
	
}
