import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

/**
 * Copyright 2012 Christopher Schmitz. All Rights Reserved.
 */

package com.isotopeent.codejam.lib.converters;

import com.isotopeent.codejam.lib.InputConverter;
import com.isotopeent.codejam.lib.Utils;

public class IntArrayLine implements InputConverter<int[]> {

	private int length;
	private int[] input;
	private int[] inputBuffer;

	/**
	 * fixed length arrays
	 */
	public IntArrayLine(int length) {
		this.length = length;
	}

	/**
	 * dynamic length arrays
	 */
	public IntArrayLine(int[] buffer) {
		inputBuffer = buffer;
	}

	@Override
	public boolean readLine(String data) {
		if (length > 0) {
			input = new int[length];
			input = Utils.convertToIntArray(data, length);
		} else {
			int count = Utils.convertToIntArray(data, inputBuffer);
			input = new int[count];
			System.arraycopy(inputBuffer, 0, input, 0, count);
		}
		return false;
	}

	@Override
	public int[] generateObject() {
		return input;
	}

}
