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();
		}
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashSet;
import java.util.Set;


public class GCJ3 {
	
	public static int pow(int num, int p) {
		int n = 1;
		while (p > 0) {
			p--;
			n *= num;
		}
		return n;
	}
	
	public static int exp(int num) {
		int e = 0;
		while (num > 0) {
			e++;
			num /= 10;
		}
		return e;
	}
	
	public static void main(String[] args) {
		try {
			BufferedReader br = new BufferedReader(new FileReader(new File("input.txt")));
			BufferedWriter bw = new BufferedWriter(new FileWriter(new File("output.txt")));
			String firstLine = br.readLine();
			int lineNum = Integer.parseInt(firstLine);
			for (int i=0; i<lineNum; i++) {
				Set<Long> set = new HashSet<Long>();
				String line = br.readLine();
				String[] segs = line.split(" ");
				int a = Integer.parseInt(segs[0]);
				int b = Integer.parseInt(segs[1]);
				int result = 0;
				int exp = exp(a);
				long off = (long)(b+1);
				for (int num=a; num<b; num++) {
					for (int j=1; j<exp; j++) {
						int key = pow(10, j);
						int key2 = pow(10, exp-j);
						int first = num / key;
						int second = num % key;
						int recycle = second * key2 + first;
						if (recycle > num && recycle <= b) {
							if (set.contains(off*num+recycle)) {
							} else {
								set.add(off*num+recycle);
								result++;
							}
						}
					}
				}
				
				bw.write("Case #" + (i+1) + ": " + result);
				if (i != (lineNum-1))
					bw.newLine();
			}
			bw.flush();
			bw.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
