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.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;


public class qc {

	public static void main(String [] args)
	{
		String fileName = "C-small-attempt0.in";
		try{
			FileReader fr = new FileReader(fileName);
			BufferedReader br = new BufferedReader(fr);
			
			FileWriter fw = new FileWriter("output.txt");
			BufferedWriter bw = new BufferedWriter(fw);
			String line="";
			int count = 0;
			int solution = 0;
			while((line=br.readLine())!=null)
			{					
				if(count == 0)
				{
					count++;
					continue;
				}
				
				String [] sp = line.split(" ");
				int [] range = new int[sp.length];
				for(int i =0; i<range.length; i++)
				{
					range[i] = Integer.parseInt(sp[i]);
				}
								
				for(int i =range[0]; i<=range[1]; i++)
				{
					String temp="" + i;
					int [] numArr = makeDigit(temp);
					for(int j =0; j<numArr.length; j++)
					{						
						if((range[0]<=i) && (i < numArr[j]) && (numArr[j] <= range[1]))
							solution++;
					}
				}
				
				bw.write("Case #"+count+": "+solution+"\n");
				
				solution = 0;
				count++;
			}
			bw.close();
			fw.close();
			br.close();
			fr.close();
			
		}catch(Exception EE){
			EE.printStackTrace();
		}
	}
	
	public static int [] makeDigit(String str)
	{		
		int [] returnArr = new int[str.length()];
		for(int i=0; i<str.length()-1; i++)
		{
			char temp = str.charAt(str.length()-1);
			str = str.substring(0, str.length()-1);
			
			String tempS = "" + temp+str;
			str = tempS;
			returnArr[i] = Integer.parseInt(str);
		}
		
		return returnArr;
	}
}
