import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t=sc.nextInt();
		int casos=1, a, b, n, m, cont;
		while(t!=0){
			a=sc.nextInt();
			b=sc.nextInt();
			if(a>b){
				int aux=a;
				a=b;
				b=aux;
			}
			System.out.printf("Case #%d: ",casos++);
			if(a==b){
				System.out.printf("%d\n",0);
			}else{
				cont=0;
				for(n=a;n<b;n++){					
					for(m=n+1;m<=b;m++){					
						if(isRecycled(n,m)) cont++;
					}
				}
				System.out.printf("%d\n",cont);
			}
			t--;
		}		
	}
	public static boolean isRecycled(int n1, int n2){
		String s1, s2, aux;
		s1 =  String.valueOf( n1 );
		s2 =  String.valueOf( n2 );		
		boolean r = false;		
		for(int i=0;i<s1.length();i++){
			aux="";
			aux=s1.substring(i,s1.length())+s1.substring(0,i);
//			System.out.println(aux);
			if(aux.equals(s2)){
				r=true;
				break;
			}
		}		
		return r;
	}
}

import java.io.*;
class recycle
{
	public static void main(String args[])throws Exception
	{
		FileReader R=new FileReader("input.txt");
		BufferedReader ds=new BufferedReader(R);
		int n=Integer.parseInt(ds.readLine());
		for(int j=1;j<=n;j++)
		{
			int i;
			String l=ds.readLine();
			for(i=0;i<l.length();i++)
			{
				if(l.charAt(i)==' ')
					break;
			}
			int a=Integer.parseInt(l.substring(0,i));
			int b=Integer.parseInt(l.substring(i+1));
			int p=1,cnt=0;
			String x="",y="";
			for(i=a;i<=b;i++)
			{
				p=1;
				x=Integer.toString(i);
				y=x.substring(p)+x.substring(0,p);
				while(!(x.equals(y)))
				{
					if(Integer.parseInt(y)>Integer.parseInt(x) && Integer.parseInt(y)<=b)
						cnt++;
					p++;
					y=x.substring(p)+x.substring(0,p);
				}
			}
			System.out.println("Case #"+j+": "+cnt);
		}
	}
}