/*
 * 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.*;

class Main {
	
	
    public static void main( String[ ] args ) {
    	Scanner in=new Scanner(System.in);
    	int cin=in.nextInt();
    	for (int ci=1;ci<=cin;ci++){
    		int a=in.nextInt(),b=in.nextInt();
    		int ans=0;
    		for (int i=a;i<b;i++){
    			HashSet<Integer> la=new HashSet<Integer>();
    			int ttmp=1;
    			int tmp=10;
    			int tgmp=10;
    			while (tgmp<=i){
    				tgmp*=10;
    			}
    			while (i>tmp){
    				tgmp/=10;
    				int m=i%tmp*tgmp+i/tmp;
    				if (m>i&&m<=b&&i%tmp>=ttmp) {la.add(m);}
    				ttmp=tmp;
    				tmp*=10;
    			}
    			ans+=la.size();
    		}
    		System.out.println("Case #"+ci+": "+ans);
    	}
    }
}
 