import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

package com.google.codejam.recycle;

import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.util.LinkedList;
import java.util.List;


/**
 * Class to read input file and prepare list of test cases.
 * @author Sushant Deshpande
 */
public class InputReader {
    /**
     * Method for preparing List of Test Cases.
     * @param inputFilePath String
     * @return List<TestCase>
     */
    public static List<TestCase> prepareTestCases(final String inputFilePath)  {
        final List<TestCase> testCases = new LinkedList<TestCase>();
        LineNumberReader lineReader = null;
        try {
            lineReader = new LineNumberReader(new FileReader(inputFilePath));
            final String line = lineReader.readLine();
            final int noOfTCs = Integer.parseInt(line);
            for(int i = 0; i < noOfTCs; i++) {
                String [] inputLine = lineReader.readLine().split(" ");
                int low = Integer.parseInt(inputLine[0]);
                int high = Integer.parseInt(inputLine[1]);
                TestCase testCase = new TestCase(i + 1, low, high);
                testCases.add(testCase);
            }
        } catch(IOException ie) {
              System.out.println("Problem occured while reading input file. " + ie.getMessage());
        } finally {
            if(lineReader != null) {
                try {
                    lineReader.close();
                } catch(IOException ie) {
                    System.out.println("Some problem occured while closing input file reader " + ie.getMessage() );
                }
            }
        }
        return testCases;
    }
}