import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
import java.util.*;
import java.io.*;
import java.math.*;
import static java.lang.System.*;
import static java.lang.Math.*;
import static java.lang.Integer.*;

public class C {
	public static void main(String args[]) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(in));
		int t = parseInt(br.readLine());
		for(int z=1;z<=t;z++) {
			String[] ss = br.readLine().trim().split("\\s+");
			HashMap<String, Integer> map = new HashMap<String, Integer>();
			int a = parseInt(ss[0]);
			int b = parseInt(ss[1]);
			for(int n=a;n<=b;n++) {
				String s = go(n);
				if(map.containsKey(s)) {
					map.put(s,map.get(s)+1);
				} else {
					map.put(s,1);
				}
			}
			long ans = 0;
			for(int x : map.values()) {
				ans += (long)x*(x-1)/2;
			}
			// out.println(map);
			out.println("Case #"+z+": "+ans);
		}
	}
	
	static int p[] = {0, 1,10,100,1000,10000,100000,1000000,10000000};
	
	static String go(int n) {
		int c = 0;
		int x = n;
		while(x > 0) {
			x /= 10;
			c++;
		}
		int max = 0;
		for(int i=0;i<c;i++) {
			max = max(max,n);
			n = (n/10) + (n%10)*p[c];
		}
		return max+"";
	}
}