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.Scanner;


public class Recycle {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int numLines = sc.nextInt();
		int lineCounts = 1;
		
		while (numLines > 0) {
			String A = sc.next();
			String B = sc.next();
//			System.out.println(A + " " + B);
			
			int result = findRecyclePairs(A, B);
			System.out.println("Case #" + lineCounts + ": " +result);
			numLines--;
			lineCounts++;
		}

	}

	private static int findRecyclePairs(String a, String b) {
		
		int result = 0;
		int strLength = a.length();
		int pos;
		int num1 = Integer.parseInt(a);
		int num2 = Integer.parseInt(b);
		int i;
		int j;
		String str1;
		String str2;
		String strTemp;
		String front;
		
		
		if (strLength > 1) {
			
			for (i = num1; i < num2; i++) {
				str1 = Integer.toString(i);
				for (j = i+1; j <= num2; j++) {
					str2 = Integer.toString(j);
					for (pos = 1; pos < strLength; pos++) {
						strTemp = str1.substring(pos);
						front = str1.substring(0, pos);
//						System.out.println(str2+ " " + front);
						
						strTemp = strTemp.concat(front);
//						System.out.println("Str2: "+ str2);
						
						if (!str2.startsWith("0") && !str1.startsWith("0")) {
							if (strTemp.equals(str2)) {
								result++;
							}
						}
					}
				}
			}
			
		}
		
		return result;
	}
	
	
}
