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.InputStreamReader;
import java.util.StringTokenizer;
class process implements Runnable {
	Thread t;
	long a=0,b=0;
	long res=0;
	int len,c=0;
	String str="";
	process(int i,long a1,long a2) {
		c=(i+1);
		a=a1;
		b=a2;
		len=String.valueOf(a).length();
		t = new Thread(this);
		t.run();
	}

	public void run() {
		
		for(long i=a;i<=b;++i)
		{
			long temp1=i;
			int temp2=0;
			int temp_len=0;
			for(int j=1;j<len;++j)
			{
					temp2=(int) (temp1%10);
					temp1=temp1/10;
					temp1=(long) ((temp2*Math.pow(10, len-1))+temp1);
					temp_len=String.valueOf(temp1).length();
					if(temp1>i && temp1<=b && (temp_len==len))//if(temp1>i && temp1<=b)
					{	
						res++;
						//System.out.println(i+"\t"+temp1);
					}
					if(temp1==i)
						break;
				
			}
		}
		
	}
	public void print()
	{
		System.out.println("Case #"+c+": "+res);
		
	}

}

public class Main {
	public static void main(String[] args) throws Exception {
		StringTokenizer st;
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int t=Integer.parseInt(br.readLine());
		process[] pr=new process[t];
		for(int i=0;i<t;++i)
		{
			st=new StringTokenizer(br.readLine());	
			pr[i]=new process(i,Long.parseLong(st.nextToken()),Long.parseLong(st.nextToken()));
		}

		for(int i=0;i<t;++i)
		{
			pr[i].t.join();
			pr[i].print();
		}
		
		
	}
}
