uses crt;
var
q:text;
s:string;
fname:string;
procedure del;
var
n:integer;
begin
repeat
n:=pos(' ',s);
if n>1 then
delete(s,n,1);
until n=0;
end;
begin
readln(s);
fname:='finish.txt';
assign(q,fname);
rewrite(q);
del;
write(q,s);
close(q);
end.