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.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;


public class C {
	public static void main(String[] args) throws FileNotFoundException {
		Scanner read = new Scanner(new File("C-small-attempt0.in"));
		PrintWriter out = new PrintWriter(new File("c-small.out"));
		int numberOfTests = read.nextInt();
		for (int i = 1; i <= numberOfTests; i++) {
			int a = read.nextInt();
			int b = read.nextInt();
			int countOfDigits = 0;
			int t = 1;
			while (a / t != 0) {
				countOfDigits++;
				t *= 10;
			}
			t /= 10;
			int result = 0;
			for (int n = a; n < b; n++) {
				int m = n;
				for (int k = 1; k < countOfDigits; k++) {
					int lastDigit = m % 10;
					m = m / 10;
					m = lastDigit * t + m;
					if (m <= b && m > n) {
						result++;
					}
				}
			}
			
			out.println(String.format("Case #%d: %d", i, result));
		}
		out.close();
	}
}
