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

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.util.HashSet;
import java.util.Scanner;

public class problemC {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner cin = new Scanner(System.in);
		int t = cin.nextInt(), a, b, c, i, ten, len, q, j = 0, ans, ts, k = 0;
		while (t > 0) {
			t--;
			k++;
			ten = 1;
			len = 1;
			a = cin.nextInt();
			b = cin.nextInt();
			c = a;
			ans = 0;
			while (c > 9) {
				c /= 10;
				ten *= 10;
				len++;
			}
			HashSet<Integer> hash = new HashSet<Integer>();
			for (i = a; i <= b; i++) {
				if (!hash.contains(i)) {
					hash.add(i);
					ts = 1;
					j = i;
					for (q = 0; q < len; q++) {
						j = (j % ten) * 10 + j / ten;
						if (j >= a && j <= b && !hash.contains(j)) {
							ts++;
							hash.add(j);
						}
					}
					ans += ts * (ts - 1) / 2;
				}
			}
			System.out.println("Case #" + k + ": " + ans);
		}
	}
}
