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.*;
import java.util.*;
public class Revn{
	static int bt[]={0,10,100,1000,10000,100000,1000000},gl[]=new int[2000001];;
public static void main(String args[])throws Exception{
BufferedReader br=new BufferedReader(new FileReader("ginp.txt"));
PrintWriter pr=new PrintWriter("Revn.txt");
int i=0,j=0,k=0,a=0,b=0,tc=Integer.parseInt(br.readLine());long co=0;
StringTokenizer st=null;
for(k=1;k<=tc;k++)
{st=new StringTokenizer(br.readLine());
a=Integer.parseInt(st.nextToken());
b=Integer.parseInt(st.nextToken());
co=0;
for(i=a;i<b;i++)
	co=co+get(i,b);

pr.println("Case #"+k+": "+co);
}
pr.close();


}
public static int get(int x,int y)
{
	String s1=""+x;
	int i=0,j=0,l=s1.length()-1,t=bt[l],ty=x,ry=0,gp[]=new int[l];
	for(i=0;i<l;i++)
	{ty=(ty%t)*10+ty/t;
		
	 ry=ty>x&&ty<=y&&gl[ty]==0?ry+1:ry;
	 if(ty<y){
         gl[ty]=1;
         gp[i]=ty;}	 
 
	}
	for(i=0;i<l;i++)
		gl[gp[i]]=0;
	return ry;
}

}
