The brave Pisces is going to fight with the evil dragon! Since the dragon is very powerful, Pisces decides to take some useful items with him. Items are divided into different kinds, and each item has a number representing the value of it. 2 items with the same value are considered of the same kind. However, Pisces's backpack is not large enough, so he has to take only one item of each kind. Please help Pisces to find which items shall he take, and print the values of chosen items in ascending order.