Program HOC24;
const fi='dl.inp';
fo='kq.out';
var f: text;
d: integer;
s: string;
procedure ip;
begin
assign(f,fi);
reset(f);
read(f,s);
close(f);
end;
procedure out;
begin
assign(f,fo);
rewrite(f);
d:=0;
for i:=1 to length(s) do
if s[i]=' ' then d:=d+1;
if d>0 then write(f,'Xau co dau cach') else write(f,'Xau khong co dau cach');
close(f);
end;
begin
ip;
out;
end.