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.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;


public class Main {

	public static void main(String[] args) throws IOException {
		Scanner scan = new Scanner(new File("input"));
		PrintWriter out =  new PrintWriter(new BufferedWriter
				   (new FileWriter("output")));
		int T = scan.nextInt();
		int compteur =1;
		while(T-->0){
			int A = scan.nextInt();
			int B=scan.nextInt();
			int nbDig = (A+"").length();
			int pui = 1;
			for(int i=0;i<nbDig-1;i++){
				pui*=10;
			}
			int rec = 0;
			int[] tab  = new int[nbDig-1];
			for(int i=A;i<B;i++){
				int u=i;
				for(int n=0;n<nbDig-1;n++){
					int mod = u%10;
					u = (u/10)+mod*pui;
					tab[n]=u;
					boolean deja = true;
					for(int j=0;j<n;j++){
						if(tab[j]==u){
							deja=false;
						}
					}
					if(u>i&&u<=B&&deja){
						rec++;
					}
				}
			}
			out.println("Case #"+compteur+": "+rec);
			compteur++;
		}
		out.close();
	}

}
