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Background

Special for beginners, ^_^

Description

笼子里有一些鸡和一些兔子，已知一只鸡有两条腿，一只兔子有四条腿，现在告诉你笼子里有 $x$ 个头和 $y$ 条腿，问笼子里有多少只鸡，多少只兔子？

Format

Input

一行两个正整数 $x$ 和 $y$ 分别代表头数和脚数。

Output

一行两个用空格分开的正整数分别代表鸡数和兔子数。

Samples

20 58

11 9

Limitation

$1\leq x\leq 10000$，$1\leq y\leq 40000$，保证问题有解。