/*
 * 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.util.*;

public class Recycle {
	static boolean[][] recycled = new boolean[10000][10000];

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);

		int T = scan.nextInt();
		for (int i = 0; i < T; i++) {
			int min = scan.nextInt();
			int max = scan.nextInt();

			int count = 0;
			for (int n = min; n < max; n++) {
				int len = len(n);
				for (int m = n + 1; m < Math.min((int)Math.pow(10, len), max + 1); m++) {
					if (recycled[n][m])
						count++;
					else if (isRecycled(n, m)) {
						count++;
						if (m <= recycled.length)
							recycled[n][m] = true;
					}
				}
			}
			System.out.println("Case #" + (i + 1) + ": " + count);
		}
	}

	static int len(int a) {
		int d = 1, len = 0;
		while (a / d > 0) {
			len++;
			d *= 10;
		}
		return len;
	}

	static boolean isRecycled(int n, int m) {
		int l = len(n);
		if (l != len(m))
			return false;

		int d = 10;
		int pow = (int)Math.pow(10, l);
		while (n / d > 0) {
			if ((n % d) * (pow / d) + n / d == m)
				return true;
			d *= 10;
		}
		return false;
	}
}
