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.lang.reflect.Array;
import java.util.*;

public class ArrayUtil {
    static<T> T[] revers (T[] t){
        List<T> list = Arrays.asList(t);
        Collections.reverse(list);
        return (T[]) list.toArray();
    }

    static<T> Map<T,Integer> listToMap(List<T> list) {
        HashMap<T, Integer> map = new HashMap<>();
        for (int i = 0; i < list.size(); i++) {
            T t = list.get(i);
            map.put(t,i);
        }
        return map;
    }

    static <T> List<T> fromIndexList(List<Integer> inds, List<T> values) {
        ArrayList<T> ts = new ArrayList<>();
        for (Integer ind : inds) {
            ts.add(values.get(ind)) ;
        }
        return ts;
    }
}
