function dele (s : string) : string; var l,i : integer; begin l := Length (s); i := l; while i>0 do begin if (s[i] = ' ') and (i<l) then if s[i+1] = ' ' then begin delete (s,i,1); i := i -1; end; i := i -1; end; Result := s; end;
var a : string; begin readln (a); writeln (dele(a)); end.
var l,i : integer;
begin
l := Length (s);
i := l;
while i>0 do
begin
if (s[i] = ' ') and (i<l) then
if s[i+1] = ' ' then
begin
delete (s,i,1);
i := i -1;
end;
i := i -1;
end;
Result := s;
end;
var
a : string;
begin
readln (a);
writeln (dele(a));
end.