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.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class Main_Recycled {
	static int a,b;
	public static void main(String[] args)throws Exception {
		File _=new File("recycled.in");
		BufferedReader br=_.exists()? new BufferedReader(new FileReader(_)):new BufferedReader(new InputStreamReader(System.in));
		int t=Integer.parseInt(br.readLine().trim());
		StringTokenizer st;
		
		boolean visited[];
		int size,total;
		int temp;
		for (int i = 1; i <= t; i++) {
			total=0;
			st=new StringTokenizer(br.readLine());
			a=Integer.parseInt(st.nextToken());
			b=Integer.parseInt(st.nextToken());
			visited=new boolean[b+1];
			for (int j = a; j <= b; j++) {
				size=0;
				temp=j;
				while(!visited[temp]){
					visited[temp]=true;
					size++;
					temp=next(temp);
				}
				total+=size*(size-1)/2;
				
				
			}
			System.out.println("Case #"+i+": "+total);
		}
	}

	private static int next(int temp) {
		String str=""+temp;
		do{
			str=str.substring(1,str.length())+str.charAt(0);
		}
		while(Integer.parseInt(str)<a||Integer.parseInt(str)>b);
		return Integer.parseInt(str);
	}
}
