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;
	}

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package uk.co.epii.codejam.common;

import java.util.ArrayList;

/**
 *
 * @author jim
 */
public class Input {
    
    private final String[] header;
    private final String[] data;

    public Input(ArrayList<String> lines, int header) {
        int size = lines.size();
        this.header = new String[header];
        this.data = new String[size - header];
        for (int i = 0; i < size; i++) {
            String line = lines.get(i);
            if (i < header)
                this.header[i] = line;
            else
                this.data[i - header] = line;
        }
    }

    public String[] getHeader() {
        return header;
    }

    public String[] getData() {
        return data;
    }
    
}
