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HIIT Open 2018

Start:2018-05-26 11:00:00
End:2018-05-26 16:00:00
 

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CSES - HIIT Open 2018 - Alien Invasion

Alien Invasion

Time limit:1.00 s
Memory limit:512 MB

The aliens are coming and there is only one way to stop them: you have to solve a difficult mathematical problem.

The aliens give you a positive integer $n$ and you have to find out if it has an even or odd number of divisors. If you can determine the correct answer, the aliens will abort their mission.

Input

The only input line has an integer $n$.

Output

Print "even" or "odd" according to the problem statement.

Constraints
Example 1

Input:
4

Output:
odd

Explanation: The divisors of $4$ are $1$, $2$ and $4$.

Example 2

Input:
6

Output:
even

Explanation: The divisors of $6$ are $1$, $2$, $3$ and $6$.