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.Scanner;


public class RecycledNumbers {

	public static int Recycled(int k,int begin,int end){
		int length =String.valueOf(k).length();
		int inc=0;
		int con=(int) Math.pow(10,length);
		int div=1;
		int temp;
		for(int i=1;i<length;i++){
			div*=10;
			con/=10;
			temp=(k%div)*con+(k/div);
			if(temp>k){
			if(temp>=begin&&temp<=end){
				inc++;
			}
			}
		}
		return inc;
	}
	public static int testcase(int begin,int end){
		int inc=0;
		for(int i=begin;i<=end;i++){
			inc+=Recycled(i,begin,end);
		}
		return inc;
	}
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int T = scan.nextInt();
		for(int i=0;i<T;i++){
			System.out.println("Case #"+(i+1)+": "+testcase(scan.nextInt(),scan.nextInt()));
		}
	}

}
