import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.*;
import java.util.*;

public class RecycledNumbers {

    private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));    
    private static Scanner sc = new Scanner(br);

    public static void main ( String [] args ) throws IOException
    {
    	int N = Integer.parseInt(br.readLine());

		for(int i = 0;i < N; i++) {
			System.out.print("Case #" + (i+1) + ": ");
			new RecycledNumbers().cal();
		}
    }	



    private void cal() throws IOException 
    {
    	int A = sc.nextInt();
    	int B = sc.nextInt();
    	
    	String aString = Integer.toString(A);
    	int length = aString.length();
    	
    	String testString;
    	String testTemp;
    	int checkingNumber;
    	int counter = 0;
    	boolean check = false;
    	
    	
    	for(checkingNumber = A; checkingNumber < B; checkingNumber++ ){
        	int[] stack = new int[length-1];
    		testString = Integer.toString(checkingNumber);
    		check = true;
    		for(int i = 0; i < length-1; i++ ){
    		
    			testTemp = testString.substring(1, length) + testString.substring(0, 1);
    			testString = testTemp;
    		
    			if( checkingNumber < Integer.parseInt(testString)){
    				if( Integer.parseInt(testString) <= B ){
    					for(int k = 0; k < i; k++)
    						if( stack[k] == Integer.parseInt(testString) ) check = false;
    					if(check){
    						counter++;
    						//System.out.println(checkingNumber + " " + testString+ " "+ counter);
    						stack[i] = Integer.parseInt(testString);
    					}
    				}
    			}
    		}
    		
    		
    	}
    	
    	System.out.println(counter);
    	
    		
    }

}


