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.*;

public class C {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int i=0; i<T; i++){
			int A = sc.nextInt();
			int B = sc.nextInt();
			int count = 0;
			for (int j=A; j<B; j++){
				if (j<10) {continue;}
				int[] recycles = recycles(j);
				for (int k=0; k<recycles.length; k++){
					int recycle = recycles[k];
					if (j<recycle && recycle<=B) {count++;}
				}
			}
			System.out.format("Case #%d: %d\n", i+1, count);
		}
		
	}
	private static int[] recycles(int a){
		String aStr = ((Integer) a).toString();
		int length = aStr.length();
		int[] result = new int[length-1];
		for (int i=0; i<length-1; i++){
			String recycle = aStr.substring(i+1, length)+aStr.substring(0, i+1);
			int recycleInt = Integer.parseInt(recycle);
			result[i] = recycleInt;
		}
		return result;
	}
	
}
