2.2 Jagjeet's Magic(v2) 🧙♂️🔮

Score: 15pts

Time Limit: 1.00 sec

In the realm of numbers, our friend Jagjeet stumbled upon a dynamic duo: L and R. With a mischievous grin, Jagjeet conjured the XOR spell – a mathematical potion of sorts. This magical formula swirled and twirled all the numbers from L to R, conjuring a brand new number X. Now, inquisitive Jagjeet raised an eyebrow and pondered, "Will this number be as even as a pancake, or dance to the oddball beat?" Ah, the numerical enigmas that keep us all entertained! 🧙♂️🔮

In short you have to check whether X is even or odd

The only difference between the v1 and v2 is the constraints

In short you have to check whether X is even or odd

The only difference between the v1 and v2 is the constraints

Constraints

1 <= L, R <= 10^18

Input Format

First and the only line contains two integer L and R

Output Format

Print "even" if the number X is even else print "odd" without the quotes.

Example 1

Input:

3 5

Output:

even

Explanation:

Here L is 3 and R is 5

Now X=(3^4^5) where '^' represents bitwise xor.

X=2.

Since X is even, the output is "even".

3 5

Output:

even

Explanation:

Here L is 3 and R is 5

Now X=(3^4^5) where '^' represents bitwise xor.

X=2.

Since X is even, the output is "even".