import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

package com.google.codejam;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class DancingWithGooglers {

	private int limit(long min, long max){
		if (min>max)
			return 0;
		int count = 0;
		for (long i = min; i <= max; i++) {
			int loopCount = 1;
			long start = i;
			long rotation = i;
			do {
				rotation = rotate(start,loopCount);
				if ( rotation <= max && rotation > start) {
//					System.out.println("pair numbers : " + start + "," + rotation);
					count+=1;
				}
//				else{
//					System.out.println("!!not pair numbers : " + start + "," + rotation);
//				}
				loopCount++;

			} while (loopCount<=Long.toString(start).length());
		}
		return count;
	}

//	private long rotate(long x){
//		if (x<9) {
//			return x;
//		}
//		long firstpart = x/10;
//		long secondpart = x%10;
//		double firstpartlen = (String.valueOf(firstpart)).length();
//		int mul = (int) Math.pow(10, firstpartlen);
//		long fin = (secondpart * mul) + firstpart;
//		return fin;
//	}
	private long rotate(long x,int index){
		if (x<9) {
			return x;
		}
		String s = Long.toString(x);
		String s1 = s.substring(0, s.length()-index);
		String s2 = s.substring(s.length()-index, s.length());
		String s3 = s2+s1;
		return Long.parseLong(s3);
	}
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new FileReader("resources/googlecodejam/dancingwiththegooglers.txt"));
		String strLine;
		int caseLine  = 0;
		int lineCount = 0;
		DancingWithGooglers dancingWithGooglers = new DancingWithGooglers();
		while ((strLine = in.readLine()) != null) {
			// Print the content on the console
			if (lineCount == 0) {
				lineCount+=1;
				continue;
			}
			caseLine += 1;
			long min = Long.parseLong(strLine.split(" ")[0]);
			long max = Long.parseLong(strLine.split(" ")[1]);
			System.out.println("Case #" + caseLine + ": " + dancingWithGooglers.limit(min,max));
		}

	}
}
