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.HashMap;
import java.util.Scanner;


public class C1 {

	public static void main(String arg[]){
		
		Scanner in=new Scanner(System.in);
		
		
		int T= in.nextInt();
		
		for(int i=1;i<=T;i++){
			int A = in.nextInt();
			int B = in.nextInt();
			int count =0;
			//System.out.println(A);

			//System.out.println(B);
HashMap <Integer,Integer> map = new HashMap<Integer,Integer>();

			int no=0;
			int temp=A;
			//int temp=0;
			while(temp>0){
				if((temp=temp/10)>0)
					no++;
			}
			//System.out.println(no);

			for(int n = A;n<=B;n++){
		     int a=1;
			while(a<=no){
				int m=(int) ((n/Math.pow(10,a)) + (n%Math.pow(10,a))*Math.pow(10,(no-a+1)));
				a++;
				if((m<=B)&&(m>n)){
					if(!(map.containsKey(n)&&(map.get(n)==m))){
					//System.out.println(n+" "+m);
				count++;
				map.put(n,m);
					}
					//else
						//System.out.println(n+" "+m);
			}
			}
		}
			System.out.println("Case #"+i+": "+count);
	
		}
}
}