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();
	}
}

/**
 * 
 */

/**
 * @author Mostafa
 *
 */
public class ReNumbersLarge {
	
	public static String traverse(String x, int index) {
		char[] m = x.toCharArray();
		int i;
		for (i=0; i<x.length(); i++) {
			m[i] = x.charAt(index);
			if (index == x.length()-1) {
				index = -1;
			}
			index++;
		}
		String t = new String(m);
		return t;
	}
	
	public static int renumber(int first, int last) {
		String[] test = new String[last-first+1];
		int i, j;
		int testc = 0;
		int count = 0;
		for (i = first; i<=last; i++) {
			String x = Integer.toString(i);
			test[testc] = x;
			testc++;
		}
		if (test[0].length() == 1) {
			count = 0;
		}
		else {
			for (i=0; i<test.length/2; i++) {
				for (j=1; j<test[i].length(); j++) {
					String s = traverse(test[i], j);
					int testme = Integer.parseInt(s);
					if (testme >= first && testme<= last && test[i].compareTo(s) != 0) {
						
						count++;
					}
				}
			}
		}
		return count;
	}
		
}
