A+B   ─── a classic problem in programming contests,   it's given so contestants can gain familiarity with the online judging system being used.



Task

Given two integers,   A and B.

Their sum needs to be calculated.



Input data

Two integers are written in the input stream, separated by space(s):

 



(
−
1000
≤
A
,
B
≤
+
1000
)


{\displaystyle (-1000\leq A,B\leq +1000)}




Output data

The required output is one integer:   the sum of A and B.



Example



 input  

 output  


 2 2 

 4 


 3 2 

 5 



$Prompt {
  `\nEnter two numbers between -1000 and +1000,\nseparated by a space: ' print flush
} def
 
$GetNumbers {
  mark stdin readline pop # Reads input as a string. Pop gets rid of false.
  cvx eval # Convert string to integers.
} def
 
$CheckRange { # (n1 n2 -- bool)
  dup -1000 ge exch 1000 le and
} def
 
$CheckInput {
  counttomark 2 ne
    {`You have to enter exactly two numbers.\n' print flush quit} if
  2 ndup CheckRange exch CheckRange and not
    {`The numbers have to be between -1000 and +1000.\n' print flush quit} if
} def
 
$Answer {
  add cvs `The sum is ' exch cat `.\n' cat print flush
} def
 
Prompt GetNumbers CheckInput Answer