package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Number {
	public static void main(String[] args) throws IOException {
		BufferedReader s = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(s.readLine());
		for (int i = 1; i <= t; i++){
			String[] a = s.readLine().split(" ");
			int A = Integer.parseInt(a[0]);
			int B = Integer.parseInt(a[1]);
			int temp = 0;
			int result = 0;
			
			for (int j = A; j < B; j++) {
				String str = "" + j ;
				int n = str.length();
				for (int k = 1; k < n; k++) {
					str = "" + str.charAt(n-1) + str.substring(0, n-1);
					temp = Integer.parseInt(str);
					if (temp > j && temp <= B)
						result++;
				}
			}
			System.out.println("Case #"+ i + ": "+ result);
		}
	}
}