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

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

import java.io.*;
import java.util.*;

public class Java{

	public static void main(String[] args) {
		try {
			BufferedReader in = new BufferedReader(new FileReader("C-small-attempt1.in"));
			int cases = Integer.parseInt(in.readLine());
			for (int i = 1; i <= cases; i ++){
				String[] temp = (in.readLine()).split(" ");
				int A = Integer.parseInt(temp[0]);
				int B = Integer.parseInt(temp[1]);
				logic(A, B, i);
			}
			in.close();
		} catch (IOException e) {
			System.out.println("INPUT ERROR");
		}
	}

	public static void logic(int A, int B, int caseNum){
		int num = A, result = 0;
		while (num < B){
			int factor = 10;
			int toFront = num%factor;
			int toBack = num/factor;
			int prev = -1;
			while (toFront < num){
				int x = Integer.parseInt(toFront+""+toBack);
				if (x > num && x <= B && x != prev){
					result ++;
					prev = x;
				}
				factor *= 10;
				toFront = num%factor;
				toBack = num/factor;
			}
			num ++;
		}
		System.out.println("Case #" + caseNum + ": " + result);
	}
}