package no3010;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws Exception {
		Process pr = Runtime.getRuntime().exec("ls /bin -F");
		InputStream is = pr.getInputStream();
		StringBuilder sb = new StringBuilder();
		ArrayList<String> lis = new ArrayList<>();
		try {
			while(true) {
				int c = is.read();
				if (c < 0) {
					break;
				}
				sb.appendCodePoint(c);
			}
		}finally{
			is.close();
		}
		String input = sb.toString();
		Scanner sc = new Scanner(input);
		while(sc.hasNext()) {
			String s = sc.next();
			if (!s.startsWith(".") && !s.endsWith("/")) {
				lis.add(s);
			}
		}
		Collections.sort(lis);
		for(String s: lis) {
			System.out.println(s);
		}
	}

}