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.util.*;

public class Recycled {
	static int CAP = 2000000;
	static long[] f;
	static int[] pow = new int[]{1,10,100,1000,10000,100000,1000000};
	public static void main(String[] args){
		Scanner reader = new Scanner(System.in);
		
		int times = reader.nextInt();
		for(int k = 1; k <= times; k++){
			int n = reader.nextInt();
			int m = reader.nextInt();
			
			fill(n,m);
			
			long sum = 0;
			for(int i = n; i <= m; i++)
				sum += (f[i]*(f[i]-1))/2l;
			System.out.println("Case #"+k+": "+sum);
		}
	}
	
	public static int getRoot(int n){
		int p = -1;
		for(int i = 0; i <= 6; i++)
			if(n/pow[i] > 0)
				p = i;
		
		int x = n;
		int min = n;
		for(int i = 0; i <= p; i++){
			x = ((x%pow[p]) * 10) + x/pow[p];
			if(x/pow[p] > 0)
				min = Math.min(min, x);
		}
		
		return min;
	}
	
	public static int getRoot(int n, int low){
		int p = -1;
		for(int i = 0; i <= 6; i++)
			if(n/pow[i] > 0)
				p = i;
		
		int x = n;
		int min = n;
		for(int i = 0; i <= p; i++){
			x = ((x%pow[p]) * 10) + x/pow[p];
			if(x/pow[p] > 0 && x >= low)
				min = Math.min(min, x);
		}
		
		return min;
	}
	
	public static void fill(int n, int m){
		f = new long[2000001];
		
		for(int i = n; i <= m; i++)
			f[getRoot(i, n)]++;
	}
	
	public static void fill(){
		f = new long[2000001];
		
		for(int i = 0; i <= CAP; i++)
			f[getRoot(i)]++;
	}
}
