You once had a pair of integers $$(a_1, a_2)$$. You decided to have fun by adding a few next numbers, creating a sequence. The initial sequence is just $$(a_1, a_2)$$, then every new number is the sum of the previous two. For example, if a sequence is $$(10, 20)$$, a new number will be $$10 + 20 = 30$$. Then the sequence is $$(10, 20, 30)$$ and a new number will be $$20 + 30 = 50$$, and so on.

One day, you woke up only to find out that you had forgotten the initial pair $$(a_1, a_2)$$. Luckily, you happen to still remember values $$a_3$$ and $$a_4$$.

Given $$a_3$$ and $$a_4$$, determine $$a_1$$ and $$a_2$$.

Input

The first and only line contains two space-separated integers $$a_3$$ and $$a_4$$.

Output

Print two space-separated integers $$a_1$$ and $$a_2$$.
Please note that these numbers could be negative.

It can be proven that, under the given constraints, the answer always exists and is unique.

Constraints

$$1 \leq a_3, a_4 \leq 10^6$$

In tests worth 60 points in total, $$a_3, a_4 \leq 1\,000$$.

Note that the expected output feature for custom input is disabled for this contest.