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.File;
import java.io.FileNotFoundException;
import java.util.Scanner;


public class RecycledNumbers {

	/**
	 * @param args
	 * @throws FileNotFoundException 
	 */
	public static void main(String[] args) throws FileNotFoundException {
		Scanner in = new Scanner(new File("C-large.in"));
		int numTests = in.nextInt();
		in.nextLine();
		for (int i = 0; i < numTests; ++i) {
			int A = in.nextInt();
			int B = in.nextInt();
			in.nextLine();
			System.out.println("Case #" + (i + 1) + ": " + recycle(A, B));
		}
	}

	private static int recycle(int A, int B) {
		int count = 0;
		for (int n = A; n < B; ++n) {
			String nStr = "" + n;
			count += compareM(n, B, nStr);
		}
		return count;
	}

	private static int compareM(int n, int B, String nStr) {
		int numberOfMGreaterThanN = 0; // and they must be less than B too
		int nStrLength = nStr.length();
		for (int i = 1; i < nStrLength; ++i) {
			String mBegin = nStr.substring(0, nStrLength - i);
			String mEnd = nStr.substring(nStrLength - i, nStrLength);
			String mStr = mEnd + mBegin;
			if (hasSameNumDigits(nStr, mStr)) {
				int m = Integer.parseInt(mStr);
				if (n < m && m <= B) {
					++numberOfMGreaterThanN;
				}
			}
		}
		return numberOfMGreaterThanN;
	}

	private static boolean hasSameNumDigits(String n, String m) {
		boolean foundFirstNonZero = false;
		int numDigitsOfN = 0;
		int numDigitsOfM = 0;
		
		for (int i = 0; i < n.length(); ++i) {
			char curChar = n.charAt(i);
			if (curChar != '0') {
				foundFirstNonZero = true;
			}
			if (foundFirstNonZero) {
				++numDigitsOfN;
			}
		}

		foundFirstNonZero = false;
		for (int i = 0; i < m.length(); ++i) {
			char curChar = m.charAt(i);
			if (curChar != '0') {
				foundFirstNonZero = true;
			}
			if (foundFirstNonZero) {
				++numDigitsOfM;
			}
		}
		
		return numDigitsOfM == numDigitsOfN;
	}
}
