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();
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.HashSet;


public class Number {
	public static int instinct(int a ){
		int b = a%10;
		int m = 0;
		while(a!=0){
			b = a%10;
			a = a/10;
			m++;
		}
		return m;
	}
	
	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new FileReader("C-large.in"));
		BufferedWriter bw = new BufferedWriter(new FileWriter("output.txt"));

		String line = "";
		line = br.readLine();
		int number = Integer.valueOf(line);
		for(int i = 1; i<= number; i++){
			line = br.readLine();
			String[] tokens = line.split(" ");
			int a = Integer.valueOf(tokens[0]);
			int b = Integer.valueOf(tokens[1]);
			int result = 0;
			for(int n = a; n<= b; n++){
				int m = instinct(n);

				HashSet<Integer> in = new HashSet<Integer>();
					for(int c = 1; c< m; c++){
						int po =(int) Math.pow(10,c);
						
						int tmp = (int) (Math.pow(10, m-c)*(n%po)+n/po);

						if(tmp >= a && tmp <=b){
							if(tmp > n){
			                    if(!in.contains(tmp)){
			                    	result++;
			                    	in.add(tmp);
			                    }
							}
						}
					}
			}
			bw.append("Case #"+i+": "+result);
			bw.newLine();
		}
		br.close();
		bw.close();

		System.out.println("finished");
	}
}
