kt so dep 68

var x,bienkiemtra:longint;
function kt(x:longint):boolean;
var r:longint;
begin
while (x<>0) do
begin
r:=x mod 10;
if (r<>6) and (r<>8) then exit(false);
x:=x div 10; end;
exit(true);
end;
begin
readln(x);
if kt(x)=true then writeln('so dep') else writeln('so xau');
readln
end.