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 



:- module a_plus_b.
:- interface.
 
:- import_module io.
:- pred main(io::di, io::uo) is det.
 
:- implementation.
:- import_module int, list, string.
 
main(!IO) :-
   io.read_line_as_string(Result, !IO),
   ( if
        Result = ok(Line),
        [AStr, BStr] = string.words(Line),
        string.to_int(AStr, A), string.to_int(BStr, B)
     then
        io.format("%d\n", [i(A + B)], !IO)
     else
        true
    ).