/*
 * 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.*;
import java.util.*;

public class C {

	private static void solve() throws IOException {
		int testCases = nextInt();
		for (int test = 1; test <= testCases; test++) {
			out.print("Case #" + test + ": ");
			solveOneTest();
		}
	}

	private static void solveOneTest() throws IOException {
		out.println(recycledPairs(nextInt(), nextInt()));
	}
	
	static int recycledPairs(int a, int b) {
		int answer = 0;
		for (int n = a; n <= b; n++) {
			String s = Integer.toString(n);
			Set<Integer> set = new HashSet<Integer>();
			for (int move = 1; move < s.length(); move++) {
				String s1 = s.substring(0, move);
				String s2 = s.substring(move);
				if (s2.startsWith("0")) {
					continue;
				}
				int m = Integer.parseInt(s2+s1);
				if (m > n && m <= b) {
					set.add(m);
				}
			}
			answer += set.size();
		}
		return answer;
	}

	public static void main(String[] args) {
		try {
			br = new BufferedReader(new FileReader("C.in"));
			out = new PrintWriter("C.out");
			solve();
			out.close();
		} catch (Throwable e) {
			e.printStackTrace();
			System.exit(239);
		}
	}

	static BufferedReader br;
	static StringTokenizer st;
	static PrintWriter out;

	static String nextToken() throws IOException {
		while (st == null || !st.hasMoreTokens()) {
			String line = br.readLine();
			if (line == null)
				return null;
			st = new StringTokenizer(line);
		}
		return st.nextToken();
	}

	static int nextInt() throws IOException {
		return Integer.parseInt(nextToken());
	}

	static long nextLong() throws IOException {
		return Long.parseLong(nextToken());
	}

	static double nextDouble() throws IOException {
		return Double.parseDouble(nextToken());
	}
}