무식하지만 ㅋㅋ
select a.*
from
(
select lpad(level,2,0) chr from dual connect by level<=99 order by 1
)a
union all
select b.chr
from (
select achr||bchr chr
from (
select a.chr achr
,b.chr bchr
,a.idx aidx
,b.idx bidx
from (
select chr(level+64) chr, level idx from dual connect by level<=26
)a
,(
select chr(level+64) chr, level idx from dual connect by level<=26
)b
where a.chr not in ('I','O')
and b.chr not in ('I','O')
)
order by aidx,bidx
)b
;