import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}


import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;

/**
 *
 * @author leonardo
 */
public class RecyclingNumbers {
  
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long inputSize = Integer.parseInt(scanner.nextLine());
        
        for (long i = 1; i <= inputSize; i++) {
            String[] input = scanner.nextLine().split(" ") ;
            
            /* No solution exists. */
            if (input.length == 1)
                continue ;
            
            long a = Long.parseLong(input[0]) ;
            long b = Long.parseLong(input[1]) ;
            System.out.println("Case #" + i + ": " + countRecyclablePairs(a, b)) ;
        }        
    }
    
    private static long countRecyclablePairs(long a, long b) {
        if (a == b)
            return 0 ;        
                
        long count = 0 ;
        for(long n = a; n <= b; n++) {                   
                                   
            LinkedList<Long> digits = toLinkedList(n) ;
            Set<Long> counted = new HashSet<Long>() ;
            
            for(long i = 0; i < digits.size(); i++) {                                
                digits.addFirst(digits.removeLast()) ;
                long m = toNumber(digits) ;
                
                if (! counted.contains(m) && n < m && m <= b) {
                    counted.add(m) ;
                    count++ ;
                }
            }            
        }
        return count ;
    }    
    
    private static LinkedList<Long> toLinkedList(long number) {
        LinkedList<Long> digits = new LinkedList<Long>() ;                
        long remainer = 0 ;
        
        while(number >= 10) {
            remainer = number % 10 ;
            digits.addFirst(remainer);
            number = number / 10 ;
        }
        
        digits.addFirst(number) ;        
        return digits ;
    }    
    
    private static long toNumber(LinkedList<Long> digits) {
        long number = 0 ;
        long expoent = digits.size() - 1 ;
        
        for(long d : digits) {
            number += d * Math.pow(10, expoent) ;
            expoent-- ;
        }
        
        return number ;
    }
}
