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.FileInputStream;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.HashSet;
import java.util.Scanner;

public class ProblemC {
	public static void main(String[] args) throws Exception {

		Scanner in = new Scanner(//
				// System.in
				new FileInputStream("c-small.in")
		// new FileInputStream("b-large.in")
		);
		PrintStream out = new PrintStream( //
				// System.out
				new FileOutputStream("c-small.out")
		// new FileOutputStream("b-large.out")
		);

		int T = in.nextInt();
		for (int i = 1; i <= T; i++) {
			int A = in.nextInt();
			int B = in.nextInt();
			int res = 0;
			for (int x = A; x < B; x++) {
				res += cycle(x, A, B);
			}
			out.println("Case #" + i + ": " + res);
		}
	}

	private static int cycle(int n, int A, int B) {
		int m = n;
		int digits = (int) Math.log10(n) + 1;
		if (digits == 1)
			return 0;
		int mul = 1;
		for (int i = 1; i < digits; i++)
			mul *= 10;
		int ret = 0;
		HashSet<Integer> used = new HashSet<Integer>();
		for (int i = 0; i < digits; i++) {
			m = (m / 10) + (m % 10) * mul;
			if (m > n && m != n && m <= B && !used.contains(m)) {
				ret++;
				used.add(m);
			}
		}
		return ret;
	}

}
