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();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

/**
 *
 * @author WC
 */
public class RecycledNumbers {

	/**
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		(new RecycledNumbers()).findRecycledNumbers("C-large.in", "C-large.out", "\n");
	}
	
	private void findRecycledNumbers(String filename, String outputFile, String separator) {
		int numberOfTestCases = CodeJamFileManager.getIntFromFirstLineOfFile(filename, separator);
		String[] testCases = CodeJamFileManager.getTextLinesOfFile(filename, separator);
				String output = "";
		for (int i = 1; i <= numberOfTestCases; i++) {
			output += "Case #" + i + ": " + getNumberOfRecycledInts(testCases[i]) + (i != numberOfTestCases ? separator : "");
		}
		CodeJamFileManager.saveOutputFile(output, outputFile, separator);
	}
	
	private int getNumberOfRecycledInts(String testcase) {
		int[] params = getIntArrayFromString(testcase.split(" "));
		int lower = params[0];
		int upper = params[1];
		int currentM = lower + 1;
		int numberOfRecycles = 0;
		while (currentM <= upper) {
			int count = timesRecycled(lower, currentM++);
			numberOfRecycles += count;
		}
		return numberOfRecycles;
	}
	
	private int timesRecycled(int lower, int currentM) {
		String currentMStr = String.valueOf(currentM);
		char[] individualNumbers = currentMStr.toCharArray();
		int timesRecycled = 0;
		for (int i = 1; i < individualNumbers.length; i++) {
			int flip = flip(individualNumbers, i);
			if (flip >= lower && flip < currentM) {
				timesRecycled++;
			}
		}
		return timesRecycled;
	}
	
	private int flip(char[] individualNumbers, int positionsToFlip) {
		char[] flip = new char[individualNumbers.length];
		int startInt = individualNumbers.length - positionsToFlip;
		int flipPos = 0;
		while (startInt < individualNumbers.length) {
			flip[flipPos++] = individualNumbers[startInt++];
		}
		int i = 0;
		while (i < (individualNumbers.length - positionsToFlip)) {
			flip[flipPos++] = individualNumbers[i++];
		}
		return Integer.parseInt(String.valueOf(flip));
	}
	
	private int[] getIntArrayFromString(String[] intStrArray) {
		int[] intArray = new int[intStrArray.length];
		int i = 0;
		for (String intStr : intStrArray) {
			intArray[i++] = Integer.parseInt(intStr);
		}
		return intArray;
	}
}
