import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

package qualification.q1;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by IntelliJ IDEA.
 * User: ofer
 * Date: 14/04/12
 * Time: 17:10
 * To change this template use File | Settings | File Templates.
 */
public class Q1Solver {
    
    private Map<Character,Character> mapping;
    
    public Q1Solver(){
        mapping = new HashMap<Character, Character>();
        mapping.put('y','a');
        mapping.put('n','b');
        mapping.put('f','c');
        mapping.put('i','d');
        mapping.put('c','e');
        mapping.put('w','f');
        mapping.put('l','g');
        mapping.put('b','h');
        mapping.put('k','i');
        mapping.put('u','j');
        mapping.put('o','k');
        mapping.put('m','l');
        mapping.put('x','m');
        mapping.put('s','n');
        mapping.put('e','o');
        mapping.put('v','p');
        mapping.put('z','q');
        mapping.put('p','r');
        mapping.put('d','s');
        mapping.put('r','t');
        mapping.put('j','u');
        mapping.put('g','v');
        mapping.put('t','w');
        mapping.put('h','x');
        mapping.put('a','y');
        mapping.put('q','z');
        mapping.put(' ',' ');
        
    }
    
    public String convertString(String encrypted){
        StringBuilder resString = new StringBuilder("");
        for (int i = 0 ; i < encrypted.length() ; i++){
            char decryptedChar = mapping.get(encrypted.charAt(i));
            resString.append(decryptedChar);
        }
        return resString.toString();
    }
}
