Simple Equation

Time Limit: 1 sec

 

The Problem

Suppose two linear equations of x and y are given.  

X + Y = m

X – Y = n

You have to find the value of x and y.

 

Example:

X + Y = 7

X – Y = 3

The value of (x, y) = (5, 2)

 

The Input

The input file contains several lines. Each line contains two integer numbers m (m<=100) and n (n<=100). Input file is terminated by end of file (EOF)

 

The Output

For each line of input the output file print the value of x and y separated by a space.

 

Sample Input

7 3

10 12

 

Sample Output

5 2

11 -1

 

 

 

 

Problem Setter: Samia Safa Ahmed