package qual;

import java.util.Scanner;

public class RecycledNumbers {

	public static void main(String[] args) {
		new RecycledNumbers().run();

	}

	private void run() {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int t = 0; t < T; t++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int result = solve(A, B);
			System.out.printf("Case #%d: %d\n", t + 1, result);
		}
	}

	public int solve(int A, int B) {
		int result = 0;
		for (int i = A; i <= B; i++) {
			int dig = (int) Math.log10(A/*same as B*/) + 1;
			int aa = i;
			for (int d = 0; d < dig - 1; d++) {
				aa = (aa % 10) * (int)Math.pow(10, dig - 1) + (aa / 10);
				if (i == aa) {
					break;
				}
				if (i < aa && aa <= B) {
//					System.out.printf("(%d, %d) ", i, aa);
					result++;
				}
			}
		}
		return result;
	}

}

import java.io.*;
import java.util.*;

public class C extends CodeJammer {

	public void process() throws IOException {
		long[] input = reader.readLongArray();
		long a = input[0];
		long b = input[1];
		int digits = 0;
		long a1 = a;
		while (a1>0) {
				  a1 /= 10;
				  digits++;
		}
		long total = 0;
		for (long x=a; x<=b; x++) {
			total += count(x,a,b, digits);
		}
		output(total);
	}

	public long count(long x, long a, long b, int d) {
		Set<Long> s = new HashSet<Long>();
		long y = x;
		for (int i=1; i<d; i++) {
			y = rotate(y,d);
			if (y>x && y>=a && y<=b) s.add(y);
  		}
		return s.size();		
	}

	public long rotate(long y, int d) {
		long digit = y%10;
		long rest = y/10;
		digit *= Math.pow(10,d-1);
		return digit + rest;
	}

	public static void main(String[] args) {
			  C c = new C();
			  c.run(args);
	}

}
