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


public class RecycledPairs {
	public static void main(String [] args) throws IOException {
		Scanner fileScan = new Scanner(new File("C-large.in"));
		BufferedWriter out = new BufferedWriter(new FileWriter("C-large.out"));
		
		int N = Integer.parseInt(fileScan.nextLine());
		for (int i = 0; i < N; i++) {
			int A = fileScan.nextInt();
			int B = fileScan.nextInt();
			int numPairs = 0;
			
			int numDigits = 0;
			int temp = A;
			while (temp > 0) {
				numDigits++;
				temp /= 10;
			}
			
			for (int n = A; n <= B; n++) {
				int check = 0;
				for (int j = 1; j < numDigits; j++) {
					int m = (int) (n/Math.pow(10, j) + (n%Math.pow(10, j))*Math.pow(10, numDigits-j));
					if (m > n && m <= B && m != check) {
						numPairs++;
						check = m;
					}
				}
			}
			
			int printTemp = i + 1;
			out.write("Case #" + printTemp + ": " + numPairs + "\n");
		}
		
		out.close();
	}
}
