/*
 * 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;


public class RecycledNum {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for(int i=0; i<T; i++)
		{
			boolean [] unused = new boolean[2000001];
			int A = sc.nextInt();
			int B = sc.nextInt();
			int numPairs = 0;
			int rot = (int) Math.floor(Math.log10(A));
			int multiplier = (int) Math.pow(10, rot);
			for(int j=A; j<=B; j++)
				unused[j] = true;
			for(int j=A; j<=B; j++)
			{
				if(unused[j])
				{
					unused[j] = false;
					int num = j;
					int numRot = 1;
					for(int k=0; k<rot; k++)
					{
						// rotate
						int part2 = (num%10);
						int part1 = (num/10);
						num = (part2 * multiplier) + part1;
						if(unused[num])
						{
							numRot++;
							unused[num] = false;
						}
					}
					// if numRot >= 2 get numRot C 2
					if(numRot > 1) numPairs += (numRot - 1) * numRot / 2;
				}
			}
			System.out.println("Case #" + (i+1) + ": " + numPairs);

			
		}
	}
}
