Lendrick Kamar
Would you trust a rose that bloomed in the dark? Only if the number of thorns it has is even!
Input Format
First line contains NNN (N<109N < 10^9N<109)
Output Format
"yes" or "no", depending on if you trust it.
Sample Input 1
2
Sample Output 1
yes
Sample Input 2
3
Sample Output 2
no