/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}

import java.io.BufferedReader;
import java.io.IOException;


public class CaseReader {
	public static String[][] getCases(String s, int linesPerCase) {
		int cases = Integer.parseInt(s.split("\n")[0]);
		String[][] ret = new String[cases][linesPerCase];
		String[] v = s.split("\n");
		for (int i = 0;i < cases;i++)
		{
			for (int j = 0;j < linesPerCase;j++) {
				ret[i][j] = v[i * linesPerCase + j + 1];
			}
		}
		return ret;
	}
	public static String[][] getCases(BufferedReader br, int linesPerCase) throws NumberFormatException, IOException {
		int cases = Integer.parseInt(br.readLine());
		String[][] ret = new String[cases][linesPerCase];
		for (int i = 0;i < cases;i++)
		{
			for (int j = 0;j < linesPerCase;j++) {
				ret[i][j] = br.readLine();
			}
		}
		return ret;
	}
}
