import java.io.*;
import java.math.BigInteger;
import java.util.*;

import org.jfree.data.function.PowerFunction2D;

public class r2a
{

	Map numMap = new HashMap();
    int output = 0;

    /**
     * @param args
     */
    public static void main(String[] args)
    {
        r2a mk = new r2a();
        try {
            FileInputStream fstream = new FileInputStream("d:/cjinput.txt");
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String str;
            int i = 0;
            while ((str = br.readLine()) != null) {
            	int begin=0,end = 0;
                i++;
                if (i == 1)
                    continue;
                mk.numMap = new HashMap();
                StringTokenizer strTok = new StringTokenizer(str, " ");
                while (strTok.hasMoreTokens()) {
                	begin =  Integer.parseInt(((String) strTok.nextToken()));
                    end = Integer.parseInt(((String) strTok.nextToken()));
                }

                mk.evaluate(i, begin, end);

            }
            in.close();
        }
        catch (Exception e) {
            System.err.println(e);
        }

    }

    private void evaluate(int rowNum, int begin, int end)
    {
    	output=0;
    	for (int i = begin; i<= end; i++) {
    		if(numMap.containsKey(Integer.valueOf(i)))
    			continue;
    		List l = getPairElems(i);
    		if (l.size() > 0) {
    			Iterator itr = l.iterator();
    			int ctr = 0;
    			ArrayList tempList = new ArrayList();
    			while (itr.hasNext()) {
    				int next = ((Integer)itr.next()).intValue();
    				if (next <= end && next > i) {
    					numMap.put(Integer.valueOf(next), i);
    					tempList.add(next);
    					ctr++;
    				}
    			}
    			ctr = getCounter(ctr+1,2);
/*    			if (tempList.size() > 0 || ctr > 0)
    				System.out.println("DD: " + i + ": " + tempList +" ; ctr = " + ctr);*/
    			output = output + ctr;
    		}
    		
    	}

        String outputStr = "Case #" + (rowNum -1) + ": " + output;
        
        System.out.println(outputStr);
    }

	private int getCounter(int n, int r) {
		int ret = 1;
		int nfactorial =1;
		for (int i = 2; i<=n; i++) {
			nfactorial = i*nfactorial;
		}
		int nrfact =1;
		for (int i = 2; i<=n-r; i++) {
			nrfact = i*nrfact;
		}
		
		return nfactorial/(2*nrfact);
	}

	private ArrayList getPairElems(int num) {
		ArrayList retList = new ArrayList();
		int temp = num;
		if (num/10 == 0)
			return retList;
		
		String str = String.valueOf(num);
		
		int arr[] = new int[str.length()];
		int x = str.length();
		while (temp/10 > 0) {
			arr[x-1] = temp%10;
			temp=temp/10;
			x--;
		}
		arr[0]=temp;
		
		int size = arr.length;
		for (int pos = size -1; pos >0; pos--) {
			if(arr[pos] == 0)
				continue;
			int pairNum = 0;
			int multiplier =1;
			for (int c=0; c < size-1; c++) {
				multiplier = multiplier*10;
			}
			pairNum = pairNum + (arr[pos]*multiplier);
			for(int ctr = pos+1, i=1; i < size; i++,ctr++) {
				if (ctr == size)
					ctr=0;
				if (multiplier!=1)
					multiplier=multiplier/10;
				pairNum = pairNum + (arr[ctr]*multiplier);
			}
			if (pairNum != num)
				retList.add(Integer.valueOf(pairNum));			
		}
		
		return retList;
	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;

import junit.framework.TestCase;

public class RecycledNumbers extends TestCase
{
	public void testMain() throws IOException {
		RecycledNumbers.main(null);
	}
	
	public static void main(String[] args) throws IOException {
		setStandardIO();
		setFileIO("recyclednumbers");

		readLine();
		int T = nextInt();
		for (int t = 1; t <= T; ++t) {
			readLine();
			int A = nextInt();
			int B = nextInt();
			int N = String.valueOf(A).length() - 1;
			
			if (N == 0) 
				println("Case #" + t + ": " + 0);
			else {
				Set<Pair> pairs = new TreeSet<Pair>();
				for (int i = A; i <= B; ++i) {
					for (int j = 0; j < N; ++j) {
						String x = String.valueOf(i);
						String y = x.substring(N - j) + x.substring(0, N - j);
						
						if (y.charAt(0) == '0')
							continue;
						
						int X = Integer.valueOf(x);
						int Y = Integer.valueOf(y);
						
						if (X == Y)
							continue;
						
						if (Y < A)
							continue;
						
						if (Y > B)
							continue;
						
						if (X < Y)
							pairs.add(new Pair(X, Y));
						else
							pairs.add(new Pair(Y, X));
					}						
				}
				
				println("Case #" + t + ": " + pairs.size());
			}
		}
		
		flush();
	}

	//~ ----------------------------------------------------------------------------------------------------------------
	//~ - Auxiliary code -----------------------------------------------------------------------------------------------	
	//~ ----------------------------------------------------------------------------------------------------------------
	static BufferedReader in;
	static PrintWriter out;
	static StringTokenizer st;

	private static void setStandardIO() {
		in = new BufferedReader(new InputStreamReader(System.in));
		out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
	}

	private static void setFileIO(String fileName) throws FileNotFoundException, IOException {
		in = new BufferedReader(new FileReader(fileName + ".in"));
		out = new PrintWriter(new BufferedWriter(new FileWriter(fileName + ".out")));
	}

	public static void readLine() throws IOException {
		st = new StringTokenizer(in.readLine());
	}

	public static int nextInt() {
		return Integer.parseInt(st.nextToken());
	}

	public static long nextLong() {
		return Long.parseLong(st.nextToken());
	}
	
	public static String nextString() {
		return st.nextToken();
	}

	public static List<String> nextStrings() {
		List<String> strings = new ArrayList<String>();
		while (st.hasMoreTokens())
			strings.add(st.nextToken());		
		
		return strings;
	}
	
	public static void flush() {
		out.flush();
	}
	
	public static void println(Object object) {
		out.println(object);
	}
	
	public static void print(Object object) {
		out.print(object);
	}

	public static long gcd(long a, long b) {
		if (b == 0) return a;
		return gcd(b, a % b);
	}
	
	public static class Pair implements Comparable<Pair>{
		public int x, y;
		public Pair(int x, int y) {
			this.x = x;
			this.y = y;
		}
		@Override
		public String toString() {
			return "Pair [x=" + x + ", y=" + y + "]";
		}
		@Override
		public int hashCode() {
			final int prime = 31;
			int result = 1;
			result = prime * result + (int) (x ^ (x >>> 32));
			result = prime * result + (int) (y ^ (y >>> 32));
			return result;
		}
		@Override
		public boolean equals(Object obj) {
			if (this == obj)
				return true;
			if (obj == null)
				return false;
			if (getClass() != obj.getClass())
				return false;
			Pair other = (Pair) obj;
			if (x != other.x)
				return false;
			if (y != other.y)
				return false;
			return true;
		}
		@Override
		public int compareTo(Pair o) {
			if (x < o.x)
				return -1;
			if (x > o.x)
				return 1;
			
			return y - o.y;
		}		
	}
}
