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();
    }
}

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Locale;
import java.util.Scanner;
import java.util.Set;


public class QuestionC {

	//final static String FNAME = "C:\\CodeJam\\RecycledNumbers";
	final static String FNAME = "C:\\CodeJam\\C-large";
	//final static String FNAME = "C:\\CodeJam\\A-large-practice";
    public static Scanner in;
    public static PrintWriter out;

    static void open() throws IOException {
        Locale.setDefault( Locale.US );
        in = new Scanner( new File( FNAME + ".in" ) );
        out = new PrintWriter( new File( FNAME + ".out" ) );
    }

    static void close() throws IOException {
        out.close();
    }

        
    
	public static void main(String[] args)throws IOException {
		open();
        int N = in.nextInt();
        //int T = Integer.parseInt(in.nextLine());
        /*    -------- Main code ----------  */
        
        for(int i = 0 ; i < N ; i++){
        	int A = in.nextInt();
        	int B = in.nextInt();
        	//System.out.println(A + "----" + B);
        	int absMinFirstDigit = Character.digit(Integer.toString(A).toCharArray()[0],10);
        	int absMaxFirstDigit = Character.digit(Integer.toString(B).toCharArray()[0],10);
        	//System.out.println(absMinFirstDigit + "----" + absMaxFirstDigit);
        	
        	long count = 0;
        	if(A>=10){
            	for(int n = A ; n <= B; n++){
            		char[] numChars = Integer.toString(n).toCharArray();
            		int maxLen = numChars.length;
            		int firstDigitOfNum = Character.digit(numChars[0],10);
            		Set<Integer> checkDupSet = new HashSet<Integer>();
            		for(int j = 1 ; j <= maxLen-1 ; j++){
            			int numAtJIindex = Character.digit(numChars[j], 10);
            			if ( (numAtJIindex<absMinFirstDigit) || 
            					(numAtJIindex>absMaxFirstDigit) || 
            					(numAtJIindex<firstDigitOfNum ) ) 
            				continue;
            			//Generate m
            			int m = 0;
            			for(int k = 0 , rot = j; k < maxLen ; k++, rot = (rot + 1)%maxLen ){
            				m = m * 10 + Character.digit(numChars[rot],10);
            				//System.out.println("Number generated : "+ m);
            			}
            			if(m>n && m<=B ){
            				if(checkDupSet.add(m)){
	            				//System.out.println("Valid Number generated : "+ n + " : " + m);
	            				count++;
            				}
            			}
            		}
            		
            	}
        	}
        		
        	
        	       	
        	
        	
	    	//Print to file	
        	out.println( "Case #" + (i+1) + ": "+count);
	        //System.out.println( "Case #" + (i+1) + ": "+count);	
        }
        
        close();

	}

}
