import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
import java.util.HashSet;
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		int t;
		Scanner s = new Scanner(System.in);
		t=s.nextInt();
		for(int k=1;k<=t;k++){
			int a,b;
			a=s.nextInt();
			b=s.nextInt();
			int al=a/10,d=1;
			while(al>0){
				d++;
				al/=10;
			}
			int count=0;
			for(int i=a;i<=b;i++){
				HashSet<Integer> hs = new HashSet<Integer>();
				for(int j=1;j<d;j++){
					int p=(int) (Math.pow(10,j));
					int l=i/p;
					int r=i%p;
					int n=r*((int) (Math.pow(10,d-j))) + l ;
					if(n>=a && n<=b && n!=i) {
						if(!hs.contains(n)){
							count++;
							hs.add(n);
						}
					}
				}
			}
			System.out.println("Case #"+k+": "+(count/2));
		}
	}
}
