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;

/**
 * Class to represent each test case.
 * It will hold details like test case no, input to be operated and TestResult.
 * @author Sushant Deshpande
 *
 */
public class TestCase {

    /**
     * Variable to hold value for test case number.
     */
    private int caseNo;

    /**
     * Variable to hold lower limit.
     */
    private int low;

    /**
     * Variable to hold upper limit.
     */
    private int high;

    /**
     * Variable holding test case result.
     */
    private TestResult output;

    /**
     * Constructor for creating TestCase with case no.
     * @param caseNo int
     * @param low int
     * @param high int
     */
    public TestCase(final int caseNo, final int low, final int high) {
        this.caseNo = caseNo;
        this.low = low;
        this.high = high;
    }

    /**
     * Settter method for TestResult.
     * @param output TestResult
     */
    public final void setOutput(final TestResult output) {
        this.output = output;
    }

    public int getHigh() {
        return high;
    }

    public int getLow() {
        return low;
    }

    /**
     * Method to format the test output for printing in the report.
     * @return String formatted output for the given input.
     */
    public final String printTestResult() {
        StringBuilder resultBuilder = new StringBuilder("Case #");
        resultBuilder.append(caseNo).append(": ");
        resultBuilder.append(output.getTestOutput()).append("\n");
        return resultBuilder.toString();
    }
}