import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
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;
}

}
