Fashion Elements

In the given array of integers, your task is to output only the elements that appear more than once. Numbers that appear only once should not be included, and among the repeating elements, you should select the one with the smallest index. If no such elements exist, output the message NO.

Input Data

The first line contains the integer N, representing the number of elements in the array. The second line contains N integers, each with an absolute value not exceeding 100.

Output Data

Print the repeating elements of the array in a single line, separated by spaces.

Examples