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Description

数学中有个经典的“鸡兔同笼”问题，已知头共X个，脚共Y只，问笼中的鸡和兔各有多少只?

Input Format

一行用空格隔开的两个整数。分别表示头和脚的个数。

Output Format

一行用空格隔开的两个整数。分别表示鸡和兔的个数。

Sample

33 90

output

21 12

Hint

保证保证鸡和兔的个数不会超过100.

时间限制：1s1s 空间限制：256MB