import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
import java.util.Scanner;


public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int numTestCases = Integer.valueOf(scanner.nextLine());
		for ( int i =0; i < numTestCases; i++ ) {
			String theCase = scanner.nextLine();
			//Error checking not necessary for now.

			Scanner lineScanner = new Scanner(theCase);
			int A = lineScanner.nextInt();
			int B = lineScanner.nextInt();
			int numDigits = getNumDigits(A,B);
			int[] powersOf10 = new int[numDigits];
			powersOf10[0] =1;
			for ( int j =1; j < numDigits; j++) {
				powersOf10[j] = powersOf10[j-1]*10;
			}
			//Brute force
			int count=0;
			for ( int number = A; number <=B; number ++ ) {
				int[] acceptedPairs = new int[numDigits]; // Defaults to 0
				for ( int firstDigit = 1; firstDigit < numDigits; firstDigit++ ) {
					//Make a new number.
					int newNum = (number%powersOf10[firstDigit])*powersOf10[numDigits-firstDigit] + number/powersOf10[firstDigit];
					if ( newNum > B || newNum <= number) {
						continue;
					}
					for ( int j=0; j < acceptedPairs.length; j++) {
						if ( acceptedPairs[j] == newNum ) {
							//Duplicate number
							break;
						} else if ( acceptedPairs[j] == 0 ) {
							//New number
							acceptedPairs[j] = newNum;
							break;
						}
					}
				}
				// Count non-zero accepted pairs
				for ( int j = 0; j < acceptedPairs.length; j++ ) {
					if ( acceptedPairs[j] == 0 ) {
						break;
					}
					count++;
				}
			}
			StringBuilder builder = new StringBuilder("Case #");
			builder.append(i+1).append(": ");
			builder.append(count);
			System.out.println(builder.toString());
		}
	}

	private static int getNumDigits(int a, int b) {
		int count = 0;
		while ( a > 0) {
			count++;
			a /= 10;
		}
		return count;
	}

}
