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


public class RecycledNumbers {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String st = in.nextLine();
		
		int n = Integer.parseInt(st);
		int a[][] = new int[n][2];
		int ans[] = new int[n];
		for(int i = 0; i< n;i++)
		{
			st = in.nextLine();
			String s[] = st.split(" ");
			
			a[i][0] = Integer.parseInt(s[0]);
			a[i][1] = Integer.parseInt(s[1]);
			
			ans[i] = getValue(a[i]);
		}
		
		for(int i=0;i<n;i++)
		{
			System.out.println("Case #"+(i+1)+": " + ans[i]);
		}	

	}
	
	private static int getValue(int a[])
	{
		int count =0;
		int m,n,k,l;
		ArrayList<String> arr = new ArrayList<String>();
		for(int i =a[0];i<= a[1];i++)
		{
			m=i;
			k=10;
			n=0;
			arr.clear();
//			System.out.print( m + "  : ");
			while(m != 0)
			{
				l = m%10;
				m=m/10;
				n=(l*k/10)+n;
				l=Integer.parseInt((String.valueOf(n) + String.valueOf(m)));
				if(l>=a[0] && l <= a[1] && l > i && !arr.contains(String.valueOf(l))) 
				{					
//					System.out.print(l +"  ");
					arr.add(String.valueOf(l));
					count++;
				}
				k*=10;
			}
//			System.out.println();
		}
		return count;
		
	}

}
