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Problems

Next even integer

Next even integer

Integer n is given. Print the next even integer for n.

Input

One integer n.

Output

Print the even integer after n.

Time limit 1 second
Memory limit 128 MiB
Input example #1
7
Output example #1
8
Input example #2
4
Output example #2
6
Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"