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.util.*;

public class RecycledNumbers {
    private final int A;
    private final int B;
    private final boolean[] allNumbers;

    public RecycledNumbers(int A, int B) {
        this.A = A;
        this.B = B;
        //numbers are A + i, where i is the array index
        allNumbers = new boolean[B - A + 1];
    }

    public int getDistinctPairsCount() {
        int distinctPairs = 0;
        for (int i = 0; i < allNumbers.length; i++) {
            if (!allNumbers[i]) {
                int number = indexToNumber(i);
                Set<String> recyclings = (number > 9) ? getRecyclings(number) : Collections.<String>emptySet();
                if (!recyclings.isEmpty()) ignore(recyclings);
                int numberOfDistinctPairs = recyclings.isEmpty() ? 0 : getNumberOfDistinctPairs(recyclings);
                distinctPairs += numberOfDistinctPairs;
            }
        }
        return distinctPairs;
    }

    private int getNumberOfDistinctPairs(Set<String> recyclings) {
        int recyclingsThatCount = 0;
        for (String s : recyclings) {
            int number = Integer.parseInt(s);
            if (withinBounds(number) && doesntStartWithZero(s))
                recyclingsThatCount++;
        }

        int pairs = recyclingsThatCount * (recyclingsThatCount - 1) / 2;
        return pairs;
    }

    private boolean doesntStartWithZero(String s) {
        boolean result = s.charAt(0) != '0';
        return result;
    }

    private boolean withinBounds(int number) {
        boolean result = number >= A && number <= B;
        return result;
    }

    private void ignore(Set<String> recyclings) {
        //set them to true in the array
        for (String s : recyclings) {
            int number = Integer.parseInt(s);
            if (withinBounds(number))
                allNumbers[numberToIndex(number)] = true;
        }
    }

    private int numberToIndex(int number) {
        return number - A;
    }

    private int indexToNumber(int i) {
        return i + A;
    }

    private Set<String> getRecyclings(int number) {
        String numberAsString = Integer.toString(number);
        int totalDigits = numberAsString.length();
        Set recyclings = new HashSet<String>();
        for (int i = totalDigits - 1; i >= 0; i--) {
            recyclings.add(numberAsString.substring(i, totalDigits) + numberAsString.substring(0, i));
        }
        return recyclings;
    }


}
