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();
    }
}

import java.util.*;

public class RecycledNumbers{

    public static void main(String[] args){
	Scanner scanner = new Scanner(System.in);
	int num = Integer.parseInt(scanner.nextLine());
	for(int i = 1; i <= num; ++i){
	    String[] tokens = scanner.nextLine().split(" ");
	    int lower = Integer.parseInt(tokens[0]);
	    int upper = Integer.parseInt(tokens[1]);
	    RecycledNumbers r =  new RecycledNumbers();
	    System.out.println("Case #" + i + ": " + r.recycledNumbers(lower, upper));
	}
    }

    public int recycledNumbers(int a , int b){
	this.lower = a;
	this.upper = b;
	for(int i = a; i <= b; ++i){
	    findAllRecycleNumbers(i);
	}
	return numRecycleNumbers;
    }

    public void findAllRecycleNumbers(int i){
	Set<Integer> pairs = new HashSet<Integer>();
	int power  = getPower(i);
	int recycleNumber = i;
	for(int count = 0; count <= power; ++count){
	    int quotient = recycleNumber / 10;
	    int remainder = recycleNumber % 10;
	    recycleNumber = (int)Math.pow(10, power) * remainder + quotient;
	    if(recycleNumber >= lower && recycleNumber > i && recycleNumber <= upper){
		if(!pairs.contains(recycleNumber)){
		    pairs.add(recycleNumber);
		    ++numRecycleNumbers;
		}
	    }
	}	
    }
    
    private int getPower(int i){
	int pow = 0;
	while(i > 9){
	    i /= 10;
	    ++pow;
	}
	return pow;
    }	

    public static class Pairs{
	int lower;
	int upper;
	public Pairs(int lower, int upper){
	    this.lower = lower;
	    this.upper = upper;
	}

    }
    private int numRecycleNumbers;
    private int lower;
    private int upper;
}