import java.util.*;
import java.io.*;

public class recycled_numbers {
	public static void main(String[]a) throws Exception{
		
		Scanner f = new Scanner(new File(a[0]));
		int result=0;
		int A,B;
		String n,m;
		HashSet<String> s=new HashSet<String>();
		
		int T=f.nextInt();	//T total case count
		for (int t=1; t<=T;t++){//for each case t
			
			s.clear();
			result=0;				//reset
			A=f.nextInt();B=f.nextInt();	//get values for next case
			
			if (A==B)result=0;//remove case not meeting problem limits 
			else{
				for(int i=A;i<=B;i++){//for each int in range
					n=Integer.toString(i);
					m=new String(n);
					//System.out.println(n);
					for (int j=1;j<n.length();j++){//move each digit to the front & test
						m = m.substring(m.length()-1)+m.substring(0,m.length()-1);
						if(m.matches("^0+[\\d]+")!=true &&
								Integer.parseInt(m)<=B &&
								Integer.parseInt(n)<Integer.parseInt(m)){
							s.add(new String(n+","+m));
							//result++;
							//System.out.println(" matched: "+m);
						}
						
					}
				}
				result = s.size();
			}

			//display output
			System.out.println("Case #" + t + ": " + result);
		}
	}
}
import java.io.File;
import java.io.PrintWriter;
import java.util.Scanner;

public class EasyNumbers { 
	public static void main(String[] args) throws Exception{
		PrintWriter out =new PrintWriter(new File("../easyNumbers/src/numberrr.out"));
		Scanner s =new Scanner(new File("../easyNumbers/src/number.in"));
		int ans,div,d,k,n1,n2,j,a,a1,b;
		int i,t;
		t = s.nextInt();
		for(int w = 1; w<=t; w++){
			a = s.nextInt();
			b = s.nextInt();
			ans=0;
			i=0;
			a1 = a;
			while(a1!=0){
				a1/=10;
				i++;
			}
			for(j=a;j<=b;j++){
				n2=j;
				for(k=0;k<i-1;k++){
					n1 = j;
					div = 1;
					while(n1 > 9){
						n1 = n1 / 10;
						div = div * 10;
					}
					d = n2 % 10;
					n2 = n2 / 10;
					n2 = n2 + d * div ;
					if(n2<=b && n2>=a && n2!=j && j<n2)
						ans++;                           
					if(n2==j)
						break;
				}
			}
		System.out.println("Case #"+ w +  ": " +ans);
		}
	}
}