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.*;
import java.io.*;
import java.lang.*;

class RecycledNumbers { 
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int T = Integer.parseInt(sc.nextLine());
    boolean[] taken = new boolean[2000001];
    
    for (int i=0; i<T; i++) {
    	int count = 0;
    	String[] dat = sc.nextLine().split(" ");
    	Arrays.fill(taken, false);
    	int digits = dat[0].length();
    	int A = Integer.parseInt(dat[0]);
    	int B = Integer.parseInt(dat[1]);
    	for (int j=A; j<=B; j++) {
    		if (!taken[j]) {
    			//System.out.println(j);
    			taken[j] = true;
    			int c = 1;
    			for (int k=1; k<digits; k++) {
    				int rem = j % (int)Math.pow(10, k);
    				int res = rem * (int)Math.pow(10, digits-k) + j / (int)Math.pow(10, k);
    				if (A <= res && res <= B && j != res && !taken[res]) { taken[res] = true; c++; }
    			}
    			if (c > 1) {
    				//System.out.println(j+" "+c);
						int r = 0;
						for (int k=c-1; k>=1; k--) r += k;
						count += r;
					}
    		}
    	}
    	
    	/*int cc= 0;
    	for (int a=A; a<=B; a++) {
    		for (int b=a+1; b<=B; b++) {
    			boolean found = false;
    			for (int k=1; k<digits; k++) {
    				int rem = a % (int)Math.pow(10, k);
    				int res = rem * (int)Math.pow(10, digits-k) + a / (int)Math.pow(10, k);
    				if (res == b) { found = true; break; }
    			}
    			if (found) { cc++; }
    		}
    	}
    	System.out.println(cc);*/
    	System.out.println("Case #" + (i+1) + ": " + count);
    }
  }
}

