Time Limit: 1 second Memory Limit: 256 megabytes ---------- Amin and Mehdi love watermelons and melons. They have bought $h$ watermelons and $k$ melons from the greengrocer. We know that the watermelons and melons are of equal weight and similar. Amin and Mehdi believe that eating each watermelon adds 2 minutes to one's lifespan. Also, eating each melon adds 1 minute to one's lifespan. They want to divide these $h + k$ fruits between themselves such that the total lifespan added for both of them is equal. They never cut a watermelon or melon in half, considering it disrespectful to the fruit! We ask you to check whether this is possible or not. # Input In the first line of the input, a non-negative integer $h$ is given. In the second line of the input, a non-negative integer $k$ is given. $$0 \leq h, k \leq 100$$ # Output In the single line of output, print the string `YES` if the division is possible, and `NO` otherwise. # Examples ## Sample Input 1 ``` 2 4 ``` ## Sample Output 1 ``` YES ``` If Amin and Mehdi each take 1 watermelon and 2 melons, 4 minutes will be added to the lifespan of both of them, so the answer is `YES`. ## Sample Input 2 ``` 3 1 ``` ## Sample Output 2 ``` NO ``` No matter how you distribute these melons and watermelons between Amin and Mehdi, the total minutes added to their lifespans will not be equal. Therefore, the answer is `NO`. ## Sample Input 3 ``` 0 0 ``` ## Sample Output 3 ``` YES ``` In this case, 0 minutes are added to the lifespan of both people, and the answer is `YES`.