SQL & PL/SQL

I want to delete some records from a table(A), these records has some relationship with another table(B)

using a query to define these A records that i want to delete

with B as
(
select '2' f, '3' l from dual
union all
select '3' f, '2' l from dual
union all
select '4' f, '4' l from dual
)


select * from A, B
where B.f>3 and B.l>3
and A.f=B.f
and A.l=B.l

Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production


Thanks in advance!