Why do I get Crash (ACCESS_VIOLATION)???
  This is my program.

var
 on,tw,th,good:array[1..510]of longint;
 s:array[1..510]of string;
 n:longint;

procedure zl;
var i:integer;
    f:set of char;
    c:char;t:text;
 begin
  f:=[];
  for c:='a' to 'z' do f:=f+[c];
  for c:='A' to 'Z' do f:=f+[c];
  assign(t,'');reset(T);
  readln(t,n);
  for i:=1 to n do
  begin
   read(t,c);s[i]:='';
   repeat
    s[i]:=s[i]+c;
    read(t,c);
   until not (c in f);
   readln(t,on[i],tw[i],th[i]);
  end;
  close(T);
 end;

procedure gc;
 var i,j,max,ho:longint;
  begin
   fillchar(good,sizeof(good),0);max:=0;
   for i:=1 to n-1 do
    begin
     for j:=i+1 to n do
      if ((on[i]>on[j])and(tw[i]>tw[j]))
      or ((th[i]>th[j])and(tw[i]>tw[j]))
      or ((on[i]>on[j])and(th[i]>th[j])) then inc(good[i]) else inc
(good[j]);

     if good[i]>max then begin
                          max:=good[i];
                          ho:=i;
                         end;
    end;
   for i:=1 to n do
    if ((on[i]>on[ho])and(tw[i]>tw[ho]))
    or ((th[i]>th[ho])and(tw[i]>tw[ho]))
    or ((on[i]>on[ho])and(th[i]>th[ho]))
    or (good[i]=good[ho])then writeln(s[i]);
  end;

begin
 zl;
 gc;
end.

This part of program get Crash (ACCESS_VIOLATION)

  f:=[];
  for c:='a' to 'z' do f:=f+[c];
  for c:='A' to 'Z' do f:=f+[c];

I don't know why :)) But it is.