Filter Non-Negative Integers

Background

Congcong is organizing his collection of numbers. He has a list of integers but is only interested in those that are non-negative.

Problem Description

Given a list of integers, return a new list containing only the non-negative integers (i.e., integers greater than or equal to $0$) from the original list, omitting any integers that are less than $0$.

Input Format

The input is given from standard input in the following format.

The input consists of a single line representing a list of integers. The list starts and ends with square brackets [ and ], and the integers inside are separated by spaces.

Output Format

The output is printed to standard output in the following format.

The output consists of a single line representing the filtered list of integers. The list starts and ends with square brackets [ and ], and the integers inside are separated by a comma and a space , . If the list is empty, output [].

Sample

[1 -2]

[1]

[-3 -3 3 3]

[3, 3]

[-1 -1 -1]

[]

Sample Explanation

For the first sample, the input list is [1 -2]. Here, $1$ is a non-negative integer, while $-2$ is a negative integer. Therefore, the new filtered list is [1].

Constraints

Time limit: $1$ second, Memory limit: $1024$ KiB for each test case.