/***********************************************************************
 * Name:
 * NetID:
 * Precept:
 *
 * Description: Reads the integer n from standard input, then reads
 * a list of n student records, where each record consists of four
 * fields, separated by whitespace:
 *     - first name
 *     - last name
 *     - email address
 *     - which section they're in
 * Then, prints a list of email address of students in sections 4 and 5.
 *
 * Compilation:  javac-introcs Students.java
 * Execution:    java-introcs Students < students.txt
 * 
 * The data file, students.txt, looks like this:
 * 130
 * Sarah Wang twang 7
 * Austin Taylor actaylor 1
 * David Rosner drosner 4
 * Rebecca Allen rebeccaa 7
 * Rajiv Ayyangar ayyangar 7
 * Daniel Barrett drbarret 8
 * Nic Byrd nbyrd 7
 * Emily Capra ecapra 8
 * Johnny Clore jclore 7
 * ...
 *
 * 
 * Your output should look like this:
 * % Section 4
 * ---------
 * drosner
 * jcharles
 * jph
 * mlampert
 * ...
 *
 * Section 5
 * ---------
 * giwank
 * agrozdan
 * ajh
 * akornell
 * ...                            (This is booksite Web Exercise 1.5.3.)
 ***********************************************************************/

public class Students {
    public static void main(String[] args) { 

        // read the number of students
        int n = ______________________________

        // declare and initialize four parallel arrays
        String[] first   = new String[n];
        ________ last    = ____________________
        String[] _______ = ____________________
        int[] section    = ____________________

        // read the data from standard input
        for (_______________; ____________________;  __________) {
            first[___]   = StdIn.readString();
            last[___]    = _________________________
            email[___]   = _________________________
            section[___] = _________________________
        }

        // print email addresses of all students in section 4
        StdOut.println("Section 4");
        StdOut.println("---------");
        for (int i = 0; i < n; i++) {
            if (________________________________) {
                StdOut.println(_____________);
            }
        }
        StdOut.println();

        // print email addresses of all students in section 5
        StdOut.println("Section 5");
        StdOut.println("---------");
        for (        





   }        
}