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.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.Vector;

public class recycledNumbers{
	public static void main(String args[]){
		try{
			PrintWriter out = new PrintWriter(new FileWriter("output.txt")); 
			Scanner sc = new Scanner(new File(args[0]));
			Integer min, max, d, n, recy;
			Vector<Integer> v;
			Vector<Integer> recV;

			int t = sc.nextInt();
			
			for(int i=1;i<=t;i++){
				n=0;
				min = sc.nextInt();
				max = sc.nextInt();
				d = min.toString().length();
				v = new Vector<Integer>();
				for(int j=min;j<=max;j++){
					recV = new Vector<Integer>();
					for(int k=1;k<d;k++){
						recy = (int) ((j%Math.pow(10,k))*(Math.pow(10,d-k)) + j/Math.pow(10,k));
						if(recy<=max && recy >=min && recy!=j && !recV.contains(recy)){
							if(!v.contains(recy)){
								n++;
								recV.add(recy);
								v.add(j);
								}
						}
					}
				}
				out.println("Case #"+i+": "+n);
			}
			

			out.close();
		}catch (Exception e){
        }
	}
}