SQL & PL/SQL :: Number Generation MINUS Number Used

Here is script of tables

Quote:drop table p;
create table p (qty number(3), beg_no number(5));
insert into p values(5, 110);
insert into p values(8, 786);

drop table s;

create table s (used_no number(5));
insert into s values(111);
insert into s values(113);
insert into s values(791);

Table p: it has ticket quantity and ticket begining number. Thus according to first record ticket number will begin at 110 and will end at 110+5 (Beg_no +qty). According to second record ticket number will begin at 786 and will end at 786+8 (Beg_no +qty). This table can have many records.

Table s: it has ticket numbers which are sold. The ticket will always be any number from table and will lay in any record in this format between beg_no and beg_no+qty

Required: I want "p MINUS s" information. i.e.

Quote:
110
112
114
786
787
788
789
790
792
793

I am not expert in level by command.

Oracle version: 9
OS: Windows XP