/*
 * 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.util.Scanner;

/**
 * author - coolprosu
 * Problem - C
 */

public class RecycledNumbers {
	private int T = 0;
	public static void main(String[] args) {
		RecycledNumbers solveProb = new RecycledNumbers();
		solveProb.solve();
	}
	private void solve() {
		Scanner sc = new Scanner(System.in);
		//Input no. of test cases
		T = sc.nextInt();
		//Solved strings
		String solutionArray[] = new String[T];	
		for(int i=0;i<T;i++) {
			solutionArray[i] = "Case #"+(i+1)+": ";
			int A = sc.nextInt();
			int B = sc.nextInt();
			int recyclePairCount = 0;
			for(int n=A;n<B;n++) {
				for(int m=n+1;m<=B;m++) {
					recyclePairCount+=countRecyclable(n,m);
				}
			}
			solutionArray[i] += recyclePairCount;
		}
		//Output result
		for(int i=0;i<T;i++) {
			System.out.println(solutionArray[i]);
		}			
	}
	private int countRecyclable(int a, int b) {
		String str1 = ""+a;
		String str2 = ""+b;
		if(str1.length()!=str2.length())
			return 0;
		int totalCombinations = 0;
		for(int i=1;i<str1.length();i++) {
			//String operation calculation
			if(str2.equals(str1.substring(i,str1.length())+str1.substring(0,i)))
				totalCombinations++;
			//Mathematical calculation
			/*int takenOut = a%((int)Math.pow(10,i));
			int previousPart = (int)a/(int)Math.pow(10,i);
			int multiplier = (int)Math.pow(10,(str1.length()-i));
			int finalInt = takenOut*multiplier + previousPart; 
			if(b==finalInt)
				totalCombinations++;*/
		}
		return totalCombinations;
	}
}
