import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class C {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			long output = solve(a, b);
			System.out.println("Case #" + (i + 1) + ": " + output);
		}
	}

	private static long solve(int a, int b) {
		if (b <= 10)
			return 0;
		int start = a;
		
		if(a <= 10) start = 11;
		
		int count = 0;
		Set<Integer> found = new HashSet<Integer>();
		for(int i = start; i < b; i++){
			String toshift = String.valueOf(i);
			int len = toshift.length();
			
			for(int j =1; j<len;j++){
				String shifted = shift(toshift, j);
				int v = Integer.valueOf(shifted);
				if(v <= b && v >a && i < v && !found.contains(v) && !shifted.startsWith("0")) {
					found.add(v);
					count++;
				}
			}
			found.clear();
		}
		return count;
	}

	private static String shift(String toshift, int j) {
		String pre = toshift.substring(0, j);
		String post = toshift.substring(j);
		return post.concat(pre);
	}
}
