import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.StringTokenizer;

public class ProblemC {

	private static final String OUT = "C:/workspaces/tc/CodeJam/src/C.out";
	private static final String IN = "D:/downloads/C-small-attempt0.in";

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(IN));
		BufferedWriter bw = new BufferedWriter(new FileWriter(OUT));
		int T = Integer.parseInt(br.readLine());
		for (int i = 0; i < T; i++) {
			StringTokenizer st = new StringTokenizer(br.readLine());
			String num = st.nextToken();
			int k = num.length();
			int A = Integer.parseInt(num);
			int B = Integer.parseInt(st.nextToken());
			int res = 0;
			int mult = 1;
			for (int j = 0; j < k - 1; j++) {
				mult *= 10;
			}
			Map<Integer, Set<Integer>> map = new HashMap<Integer, Set<Integer>>(2000000);
			for (int j = A; j <= B; j++) {
				int t = j;
				for (int l = 0; l < k - 1; l++) {
					int rem = t % 10;
					t = rem * mult + t / 10;
					if (t > j && t <= B && t >= A) {
						Set<Integer> set = map.get(j);
						if (set == null) {
							set = new HashSet<Integer>(6);
						}
						set.add(t);
						map.put(j, set);
					}
				}
			}
			for (Entry<Integer, Set<Integer>> entry : map.entrySet()) {
				res += entry.getValue().size();
			}
			bw.write("Case #" + (i + 1) + ": " + res + "\n");
		}
		bw.close();
	}
}
