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 QC {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int[][] ROT = new int[2000001][7];
		for(int i=1; i<=2000000; i++) {
			int A = i;
			int pow10 = 1;
			while(A > 0) { pow10*=10; A/=10; }
			pow10 /= 10;
			A = i;
			int ix = 0;
			do {
				if(A < i)
					ROT[i][ix++] = A;
				A = pow10*(A%10)+A/10;
			} while(A != i);
		}
		
		int T = in.nextInt();
		for(int cas=0; cas<T; cas++) {
			int A = in.nextInt();
			int B = in.nextInt();
			long ans = 0;
			Set<Integer> U = new HashSet<Integer>();
			for(int i=A; i<=B; i++) {
				long cnt = 0;
				for(int j=0; j<7; j++) {
					if(ROT[i][j]<i && ROT[i][j]>=A && ROT[i][j]<=B)
						cnt++;
				}
				ans += cnt;
			}
			System.out.println("Case #"+(cas+1)+": "+ans);
		}
	}
}