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.InputStreamReader;
import java.util.*;

public class RecycledNumbers {
	BufferedReader reader;
	char [] charInput;
	String [] inputArray;
	int index;
	RecycledNumbers()throws Exception{
		String input=null;
		reader = new BufferedReader(new InputStreamReader(System.in));
		while(reader.ready()){
			if (input==null){
				input =reader.readLine();
			}
			else{
				input =input+ " " + reader.readLine();
			}
		}
		inputArray=input.trim().split(" ");
		index=0;
	}
	String nextInput()throws Exception{
		if(index<inputArray.length){
			int temp=index;
			index++;
			return inputArray[temp];
		}
		else{
			return "\0";
		}
	}
	
	
	void start()throws Exception{
		LinkedList<Integer> prevMatches=new LinkedList<Integer>();
		int numCases=Integer.parseInt(nextInput());
		int A;
		int B;
		int numRecycledPairs=0;
		int [] numArray;
		int digits;
		int testNum=0;
		boolean prevExists=false;
		for(int i=0;i<numCases;i++){
			A=Integer.parseInt(nextInput());
			B=Integer.parseInt(nextInput());
			digits=numDigits(A);
			numRecycledPairs=0;
			for(int j=A;j<=B;j++){
				prevMatches.clear();
				numArray=new int[digits*2-1];
				testNum=j;
				for (int k=numArray.length-1;k>=0;k--){
					testNum=testNum/10;
					if(k==digits-1){
						testNum=j;
					}
					numArray[k]=testNum%10;
				}
				for (int k=1;k<digits;k++){
					testNum=0;
					for (int l=k;l<digits+k;l++){
						testNum=testNum*10;
						testNum=testNum+numArray[l];
					}
					if (prevMatches.size()==0){
						prevExists=false;
					}
					else{
						for (Integer m: prevMatches){
							if (m.intValue()==testNum){
								prevExists=true;
								break;
							}
							else{
								prevExists=false;
							}
						}
					}
					if (testNum>=A && testNum<=B && testNum>j && prevExists==false){
						numRecycledPairs++;
						prevMatches.add(new Integer(testNum));
					}
				}
			}
			System.out.printf("Case #%d: %d", i+1,numRecycledPairs);
			if (i!=numCases-1){
				System.out.println();
			}
		}
	}


	//credit to Marian	
	//http://stackoverflow.com/questions/1306727/way-to-get-number-of-digits-in-an-int
	int numDigits(int n){
		if (n < 100000)
		{
			// 5 or less
			if (n < 100)
			{
				// 1 or 2
				if (n < 10)
					return 1;
				else
					return 2;
			}
			else
			{
				// 3 or 4 or 5
				if (n < 1000)
					return 3;
				else
				{
					// 4 or 5
					if (n < 10000)
						return 4;
					else
						return 5;
				}
			}
		}
		else
		{
			// 6 or more
			if (n < 10000000)
			{
				// 6 or 7
				if (n < 1000000)
					return 6;
				else
					return 7;
			}
			else
			{
				// 8 to 10
				if (n < 100000000)
					return 8;
				else
				{
					// 9 or 10
					if (n < 1000000000)
						return 9;
					else
						return 10;
				}
			}
		}
	}
}

