/*
 * 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.*;

public class C {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        C th = new C();
        for (int i = 0; i < T; i++) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            int c = th.getAnswer(A, B);
            System.out.println("Case #" + (i+1) + ": " + c);
        }
    }
    public int getAnswer(int A, int B) {
        if (A == B) {
            return 0;
        }
        int count = 0;
        for (int i = A; i < B; i++) {
            String s = "" + i;
            int l = s.length();
            int[] it = new int[l];
            for (int j = 0; j < l; j++) {
                String t = getRotate(s, j+1);
                it[j] = Integer.parseInt(t);
                if (it[j] <= B && it[j] > i) {
                    boolean f = true;
                    for (int k = 0; k < j; k++) {
                        if (it[k] == it[j])
                            f = false;
                    }
                    if (f)
                        count++;
                }
            }
        }
        return count;
    }
    public String getRotate(String s, int r) {
        char[] ch = s.toCharArray();
        int n = ch.length;
        char[] buf = new char[n];
        for (int i = 0; i < r; i++) {
            buf[n-r+i] = ch[i];
        }
        for (int i = 0; i < n-r; i++) {
            buf[i] = ch[r+i];
        }
        return new String(buf);
    }
}

