import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.util.ArrayList;
import java.util.Scanner;

public class RecycledNumbers {
	static ArrayList<pair> list=new ArrayList<pair>();
	public static void main(String[] args) {
		int pow[]=new int[10];
		for(int i=0;i<10;i++){
			pow[i]=(int)Math.pow(10, i);
		}
		
		Scanner sc=new Scanner(System.in);
		int t=sc.nextInt();
		for(int i=0;i<t;i++){
			int a=sc.nextInt();
			int b=sc.nextInt();
			int ans=0;
			for(int n=a;n<=b;n++){
				int keta=0;
				for(int k=10;n/k>0;k*=10)
					keta++;
				list.clear();
				for(int k=0;k<keta;k++){
					int m=n/pow[k+1]+(n%pow[k+1])*pow[keta-k];
					if(n<m && m<=b){
						if(some(n,m)){
							list.add(new pair(n,m));
							ans++;
						}
					}
				}
			}
			System.out.println("Case #"+(i+1)+": "+ans);
		}
	}
	static boolean some(int n,int m){
		for(pair p : list){
			if(p.equals(n, m)){
				return false;
			}
		}
		return true;
	}
	static class pair{
		int n,m;
		public pair(int n,int m){
			this.n=n;
			this.m=m;
		}
		public boolean equals(int n,int m){
			return this.n==n && this.m==m;
		}
	}
}
