program ss;
var
a,b:qword;
s,c:string;
i,j,k,x,y,z:integer;
begin
readln(c);
x:=0; y:=0;
if c[1]=- then begin x:=1; delete(c,1,1); end;
i:=1; a:=0;
while c[i] in [0..9] do
begin
a:=a*10+ord(c[i])-ord(0);
inc(i);
end;
delete(c,1,i);
if c[1]=- then begin y:=1; delete(c,1,1); end;
i:=1; b:=0;
while (i<=length(c))and(c[i] in [0..9]) do
begin
b:=b*10+ord(c[i])-ord(0);
inc(i);
end;
s:=;
i:=0;
j:=0;
if x=y then
begin
if a>b then begin z:=x; a:=a-b; end;
if a=b then begin z:=0; a:=0; end;
if a<b then begin z:=1-x; a:=b-a; end;
end
else
begin
z:=x; a:=a+b;
end;
if a=0 then s:=0;
while a>0 do
begin
k:=a mod 10;
s:=chr(ord(0)+k)+s;
inc(i);
if i mod 3=0 then s:=,+s;
a:=a div 10;
end;
if s[1]=, then delete(s,1,1);
if z=1 then s:=-+s;
write(s);
end.