Positive Even Numbers up to N

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

Print all positive even integers not exceeding n, starting from 2. If n<2, output an empty line.

Input

One integer n.

Output

One line of positive even numbers, separated by single spaces.

Subtasks

• Subtask 1 (20%): $0\le n\le10$.
• Subtask 2 (30%): $0\le n\le100$.
• Subtask 3 (50%): $0\le n\le1000$.

Examples

Example 1

Input

7

Output

2 4 6

Explanation

The positive even values up to 7 are 2, 4 and 6.

Example 2

Input

1

Output

Explanation

There are no positive even integers at most 1.