Assignemnt #49 and GenderGame

Code
/// Name: Yordan Rashkov
/// Period: 7
/// Program Name: GenderGame
/// File Name: GenderGame.java
/// Date Finished: 11/18/2015

import java.util.Scanner;
 
public class GenderGame
{
    public static void main( String[] args )
    {
         Scanner keyboard = new Scanner(System.in);
         
         String gender, First, Last, input;
         int Age; 
         
         System.out.println(" What is your gender (M or F): ");
         gender = keyboard.next();
         
         System.out.println(" First Name: ");
         First = keyboard.next();
         
         System.out.println(" Last Name: ");
         Last = keyboard.next();
         
         System.out.println(" Age: ");
         Age = keyboard.nextInt();
         
        
         if (Age >= 21)
         System.out.println( "Are you married, " + First + " (input y or n)? ");
         input = keyboard.nextLine();
         
         if (Age >= 21 && gender.equals("M"))
            System.out.print(" Then I shall call you Mr. " + Last + " ");
         else if (Age >= 21 && gender.equals("F"))
            System.out.print(" Then I shall call you Mrs. " + Last + " ");
         else if (Age >= 16 && Age <= 18)
            System.out.print(" Then I shall call you " + First + " " + Last + " ");
    
    
    }
}