package com.javarush.task.pro.task05.task0508;
import java.util.Scanner;
/*
Удаляем одинаковые строки
*/
public class Solution {
public static String[] strings;
public static void main(String[] args) {
Scanner a = new Scanner(System.in);
strings = new String[6];
for (int i = 0; i < strings.length; i++) {
strings[i] = a.nextLine();
}
for (int j = 0; j < strings.length; j++) {
for (int k = 1; k < strings.length; k++) {
if (k > j) {
if (strings[k]==null) {
continue;
} else if (strings[k].equals(strings[j]) && strings[j] != null) {
strings[k] = null;
strings[j] = null;
}
}
}
}
for (int n = 0; n < strings.length; n++) {
System.out.print(strings[n] + ", ");
}
}
}