package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;


public class Solution {
	
	public static void main(String[] args)
	{
		Scanner s = new Scanner(System.in);
		int size = s.nextInt();
		for (int count = 1; count <= size; count++){
			
			int lowB = s.nextInt();
			int highB = s.nextInt();
			int pairCount = 0;
			int bits = (lowB+"").length();
			int mod = (int)Math.pow(10, (bits-1));
			Set<Integer> seen = new HashSet<Integer>();
			//System.out.println("(" + lowB + ", " + highB + "), " + "bits = " + bits + ", mod = " + mod);
			for (int i = lowB; i <= highB; i++){
				 
				int num1 = i;
				int num2 = i;
				seen.clear();
				for (int j = 1; j < bits; j++){
					int div = num2 / mod;
					int modular = num2 % mod;
					num2 = modular * 10 + div;
					
					if (num2 < lowB || num2 <= num1 || num2 > highB || seen.contains(num2)) continue;
					//System.out.println("(" + num1 + ", " + num2 + ")");
					pairCount++;
					seen.add(num2);
				}
			}
		System.out.println("Case #" + count+ ": " + pairCount);	
		}
		
		
		
	}

}
